SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-K

                  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                   For the fiscal year ended December 31,1997


                          Commission file number 0-3797

                                  MASTEC, INC.
             (Exact name of registrant as specified in its charter)

            Delaware                                      59-1259279
 (State or other jurisdiction                          (I.R.S. Employer
of incorporation or organization)                     Identification No.)

   3155 N.W. 77th Avenue, Miami, FL                        33122-1205
(Address of principal executive offices)                   (Zip Code)

       Registrant's telephone number, including area code: (305) 599-1800

               Securities registered pursuant to Section 12(b) of
                                    the Act:

                                                   Name of each exchange on
       Title of each class                             which registered

   Common Stock, $.10 Par Value                     New York Stock Exchange

               Securities registered pursuant to Section 12(g) of
                                    the Act:

                                      None

                              (Title of each class)

         Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934 during the preceding 12 months (or for such period that the  registrant was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. Yes X No.

         Indicate by check mark if disclosure of delinquent  filers  pursuant to
Item 405 of Regulation S-K is not contained  herein,  and will not be contained,
to the best of  registrant's  knowledge,  in  definitive  proxy  or  information
statements  incorporated  by  reference  in Part  III of this  Form  10-K or any
amendment to this Form 10-K. |_|

         The number of shares of Common Stock  outstanding  as of March 20, 1998
was  27,736,541.  The  aggregate  market  value  of the  voting  stock  held  by
non-affiliates  of the registrant  computed by reference to the closing price of
the  registrant's  Common Stock on the New York Stock Exchange on March 20, 1998
was $428,346,532.  Directors, executive officers and 10% or greater stockholders
are  considered  affiliates  for  purposes  of this  calculation  but should not
necessarily be deemed affiliates for any other purpose.

Documents Incorporated by Reference

         Portions  of the  registrant's  Proxy  Statement  for the  1998  Annual
Meeting of Stockholders to be held on May 14, 1998, which will be filed with the
Commission on or before April 15, 1998, are  incorporated by reference into Part
III.





         Certain statements included in this Annual Report are  forward-looking,
such as  statements  regarding  the future  prospects of the  telecommunications
construction  industry and the Company's growth strategy.  These forward-looking
statements are based on the Company's current  expectations and are subject to a
number of risks and uncertainties  that could cause actual results in the future
to differ significantly from results expressed or implied in any forward-looking
statements  included  in this  Annual  Report.  These  risks  and  uncertainties
include,  but  are not  limited  to,  uncertainties  relating  to the  Company's
relationships  with key customers  and  implementation  of the Company's  growth
strategy.  These and other risks are detailed in this Annual Report and in other
documents filed by the Company with the Securities and Exchange Commission.


                                   1. BUSINESS

General

         MasTec is one of the world's  largest  contractors  specializing in the
design,    installation    and   maintenance   of    infrastructure    for   the
telecommunications and other utilities industry. The Company's business consists
of the  installation of aerial and underground  copper,  coaxial and fiber optic
cable networks as well as wireless antenna networks  ("outside plant services").
The Company believes it is the largest independent  contractor for these systems
in the United  States and Spain,  and one of the largest in  Argentina,  Brazil,
Chile and Peru. The Company also installs  central office  switching  equipment,
and designs,  installs and maintains  integrated voice, data and video local and
wide area networks inside buildings ("inside wiring"). Clients for the Company's
services  include major  domestic and  international  telecommunication  service
providers  such  as the  regional  Bell  operating  companies  ("RBOCs"),  other
incumbent and competitive local exchange carriers,  cable television  operators,
long-distance operators and wireless phone companies.  The Company also provides
infrastructure  construction  services to the electric  power industry and other
public utilities.

         MasTec has experienced significant and consistent growth as a result of
its favorable trends in the telecommunications industry, its ability to identify
and integrate strategic acquisitions and, its competitive position as one of the
largest  providers  of  infrastructure   services.  The  Company's  revenue  has
increased  from $142.6  million in 1994 to $703.4  million in 1997.  The Company
expects to continue to grow through additional strategic acquisitions as well as
through  internal  expansion.  Since January 1996,  the Company has completed 16
domestic  and  three  foreign  acquisitions  and  actively  continues  to pursue
complimentary  acquisitions  in the highly  fragmented  infrastructure  services
industry.  Internal  growth is  expected  to be driven by the  expansion  of the
global  telecommunications and power distribution  industries resulting from (i)
continued global deregulation,  which is allowing numerous new service providers
to enter the marketplace and is increasing the competitive  pressure on existing
participants  to upgrade and expand their  networks;  (ii)  increasing  consumer
demand for  advanced  communications  services  which  require the  upgrading of
existing   infrastructure  to  handle  increased   bandwidth  needs;  and  (iii)
increasing  reliance on  outsourcing  of  infrastructure  needs to full  service
contractors by service providers in an effort to reduce costs and focus on their
core competencies.

Competitive Strengths

          The Company seeks to differentiate itself from its competitors through
the following characteristics:

         Strong  Customer  Relationships.  Founded  in  1929,  the  Company  has
developed  strong   relationships  with  numerous   telecommunications   service
providers  by  providing  high  quality  services  in a cost and time  efficient
manner.  The Company has been providing  services to Telefonica de Espana,  S.A.
("Telefonica") and BellSouth  Telecommunications,  Inc.  ("BellSouth"),  its two
largest  customers,  since 1950 and 1969,  respectively,  and maintains  similar
long-term  relationships  with many of its other  customers.  For the year ended
December 31, 1997, the company derived  approximately 26% and 12% of its revenue
from services  performed for  Telefonica  and  BellSouth,  respectively.  MasTec
currently has 23 multi-year  service  contracts with  Telefonica,  the RBOCs and
other  telecommunications  service  providers for certain of their outside plant
requirements  up  to a  specific  dollar  amount  per  job  and  within  certain
geographic areas.

         Diverse Customer Base.  MasTec provides a full range of  infrastructure
services to a diverse customer base. Domestically,  the Company provides outside
plant  services  to  local  exchange  customers  such  as  BellSouth,   US  West
Communications,  Inc., SBC  Communications,  Inc.,  United Telephone  Company of


                                       2


Florida,   Inc.  (a  subsidiary  of  Sprint  Corporation   ("Sprint"))  and  GTE
Corporation.  The Company also provides  outside plant  services to  competitive
local  exchange  carriers  such  as MFS  Communications  Company,  Inc.,  Sprint
Metropolitan   Networks,   Inc.  and  MCI  Metro,   Inc.  (the  local  telephone
subsidiaries   of   Sprint   and   MCI   Communications   Corporation   ("MCI"),
respectively),  cable  television  operators  such  as  Time  Warner  Inc.,  Cox
Communications,  Inc. and Marcus Cable Company,  long distance  carriers such as
MCI and Sprint, and wireless  communications  providers such as PrimeCo Personal
Communications  LP  and  Sprint  Spectrum,  L.P.  Internationally,  the  Company
provides outside plant services,  turn-key  switching  systems  installation and
inside wiring services primarily to Telefonica,  the principal telephone company
in Spain, and Telefonica's affiliates in Argentina,  Chile and Peru. The Company
also services the local telephone  subsidiaries of Telecomunicacoes  Brasileiras
S.A. ("Telebras"), the Brazilian government-owned  telecommunications system, in
Sao Paulo,  Rio de Janeiro,  Parana and other  states in the more  populous  and
developed  Southern  region of  Brazil,  as well as  Companhia  Riograndense  de
Telecomunicacoes  S/A ("CRT"),  the local telephone company in Rio Grande do Sul
which is partly owned by  Telefonica.  For the year ended December 31, 1997, the
Company  derived  approximately  11% of its revenue from services  performed for
Telebras.

         The  Company  renders  inside  wiring  services   nationwide  to  large
corporate  customers with multiple  locations such as First Union National Bank,
International  Business  Machines  Corporation  ("IBM") and Dean Witter Reynolds
Inc., and to universities and health care providers.

         Turn-key  Capabilities.  The  Company  believes  it is one  of the  few
contractors capable of providing all of the design, installation and maintenance
services  necessary for a cable or wireless network starting from a transmission
point, such as a central office or head-end,  and running  continuously  through
aerial and  underground  cables to the ultimate end users' voice and data ports,
cable outlets or cellular  stations.  The Company can also install the switching
devices at a central office or set up local and wide area voice,  data and video
networks to expand a business'  telecommunications  infrastructure both inside a
specific structure or between multiple structures.

         The  Company  believes  that its  customers  increasingly  are  seeking
comprehensive  solutions  to  their  infrastructure  needs by  turning  to fewer
qualified  contractors  who have the size,  financial  capability  and technical
expertise  to  provide a full  range of  infrastructure  services.  The  Company
believes that this trend will accelerate as industry consolidations increase and
as these  consolidated  entities begin to provide bundled services to end users.
The Company believes it has positioned itself through  acquisitions and internal
growth  as  a  full  service   provider  of  outside  plant  and  inside  wiring
infrastructure services to take advantage of this trend.

         Broad Geographic Presence. The Company has significantly  broadened its
geographic   presence   in  recent   years   through   strategic   acquisitions.
Domestically, MasTec has expanded beyond its historical base in the Southeastern
United  States  and  currently  has  operations  in more  than 30  states in the
Southeast,  mid-Atlantic,  Southwest,  West and  upper  Midwest  regions  of the
country. The Company also substantially  increased its international  operations
through  the  acquisition  in  April  1996  of  Sistemas  e   Instalaciones   de
Telecomunicacion, S.A. ("Sintel"), the largest telecommunications infrastructure
contractor  in Spain,  and  through the  acquisition  in July 1997 of a majority
interest in MasTec Inepar S/A Sistemas de Telecomunicacoes  ("MasTec Inepar"), a
leading  telecommunications  construction  company in  Brazil.  Due to its broad
geographic  presence,  the  Company  believes  that it is well suited to service
customers with operations across the United States as well as companies that are
active in multiple  areas of the world such as  multinational  corporations  and
telecommunications  service  providers  that are  expanding  into  international
markets. In addition,  by developing  business in many geographic  regions,  the
Company believes it is less susceptible to changes in the market dynamics in any
one region.

Growth Strategy

         The  Company  is  pursuing  a   disciplined   strategy  of  growth  and
diversification in its core business through strategic acquisitions and internal
expansion as follows:

         Strategic  Acquisitions.  The  Company  plans  to  continue  to  pursue
strategic  acquisitions  in  the  fragmented  telecommunications  and  utilities
infrastructure  industry that either expand its geographic coverage and customer
base or broaden  the range of  services  it can offer to  clients.  The  Company
focuses its acquisition  efforts  primarily on companies with  successful  track
records  and strong  management.  The Company has  acquired 19  companies  since
January 1996 and has  significant  experience  in  identifying,  purchasing  and
integrating  telecommunications  infrastructure businesses both domestically and
internationally. Management believes that MasTec is able to improve the acquired
companies' operating performance by providing strategic guidance, administrative
support,  greater  access  to  capital  and  savings  in the  cost  of  capital,
purchasing and insurance costs.


                                      3


         Internal Expansion.  The Company believes it is poised to capitalize on
the  anticipated  growth in its industry due to its status as one of the world's
largest  telecommunications  infrastructure  contractors and its strong customer
relationships. The International Telecommunications Union estimates that between
1996 and 2000  telecommunications  infrastructure  investment  will  exceed  $50
billion in the United  States  and $600  billion  worldwide.  In  addition,  the
Company believes that the RBOCs and other utilities in the United States,  which
still conduct a significant  portion of their  construction work in-house,  will
out-source  more  infrastructure  construction  in the  future  in  response  to
competitive  pressures to cut costs,  streamline  their  operations and focus on
their core  competencies.  The Company  believes that its reputation for quality
and reliability,  operating efficiency, financial strength, technical expertise,
presence  in  key  geographic  areas  and  ability  to  offer  a full  range  of
construction  services  make it well  positioned  to compete for this  business,
particularly the larger, more technically complex infrastructure projects.

         The Company also anticipates that its Brazilian  operations will become
a more  significant  part  of  its  operations.  The  Brazilian  government  has
estimated that  approximately  $75 billion will need to be invested over a seven
year  period  in order  to  modernize  and  expand  Brazil's  telecommunications
infrastructure.  To accomplish  this  objective,  the  government has stated its
intention of deregulating and privatizing  Brazil's  telecommunications  system.
The Company  believes  that,  through MasTec  Inepar,  it is well  positioned to
participate in this anticipated expansion.

         In addition to focusing on its core telecommunications  customers,  the
Company   plans  to  achieve   incremental   growth  by  continuing  to  develop
complementary  lines of businesses.  These  businesses  include the provision of
premise wiring services to corporations and infrastructure construction services
to the electric power industry and other public utilities.

Services, Markets and Customers

         The Company's principal business is the provision of telecommunications
and other utilities  infrastructure  construction  services,  consisting of both
outside plant services and inside wiring services. For the years ended, December
31, 1995, 1996 and 1997, the percentage of the Company's total revenue generated
by outside  plant  services was 91%, 84%, and 84%,  respectively,  and by inside
wiring services was 9%, 16% and 16%, respectively. The Company operates in North
America,  Spain,  Argentina,  Chile,  Peru,  and Brazil.  See Note 9 of Notes to
Consolidated Financial Statements for a description of revenue, operating profit
and  identifiable  assets  attributable  to the  Company's  North  American  and
International operations.

Telecommunications Construction - North American Operations

         Outside Plant  Construction.  The Company's principal domestic business
consists of outside plant services for telecommunications  providers,  including
incumbent and competitive local exchange carriers,  cable television  operators,
long-distance  carriers and wireless  communications  providers.  Outside  plant
services  consist  of all of the  services  necessary  to  design,  install  and
maintain the physical  facilities  used to provide  telecommunications  services
from the provider's  central  office,  switching  center or cable headend to the
ultimate  consumer's  home or business.  These services  include the placing and
splicing of cable,  the excavation of trenches in which to place the cable,  the
placing  of  related  structures  such as poles,  anchors,  conduits,  manholes,
cabinets  and  closures,  the  placing of drop lines from the main  transmission
lines to the customer's  home or business,  and the  maintenance  and removal of
these facilities.  The Company has developed  expertise in directional boring, a
highly  specialized  and  increasingly  common  method of placing  buried  cable
networks in congested urban markets without digging a trench.

         The  Company  provides a full range of outside  plant  services  to its
telecommunications   company  customers,   although  certain  of  the  Company's
customers, principally the RBOCs, handle certain of these services in-house. The
Company's  customers  generally  supply  materials  such as cable,  conduit  and
telephone equipment,  and the Company provides the expertise,  personnel,  tools
and equipment  necessary to perform the required  installation  and  maintenance
services.

         The Company  currently  provides  outside plant  services  primarily to
customers in Alabama, Alaska, Arizona,  California,  Colorado, Florida, Georgia,
Iowa, Kansas,  Michigan,  Minnesota,  Montana,  Nebraska,  North Carolina, North
Dakota, South Dakota, South Carolina, Tennessee, Texas, Virginia and Wyoming, as
well as Ontario,  Canada.  Principal  customers for  telecommunications  outside


                                       4


plant  services   include   BellSouth,   US  West   Communications,   Inc.,  SBC
Communications,  Inc., the long distance and local exchange subsidiaries of both
MCI and Sprint, GTE Corp., MFS Communications  Company,  Inc., Time Warner Inc.,
Cox Communications, Inc. and Marcus Cable Company.

         Services rendered to the Company's  incumbent local exchange customers,
including  BellSouth,  are performed  primarily  under master  contracts,  which
typically  are  exclusive  service  contracts  to provide  all of the  carrier's
outside  plant  requirements  up to a  specified  dollar  amount  per job within
certain  geographic areas. These contracts generate revenue ranging between $3.0
million and $30.0 million over their  respective  terms,  generally two to three
years.  Such contracts are typically  subject to termination at any time upon 90
to 180 days prior  notice to the  Company.  Each  master  contract  contemplates
hundreds of individual construction and maintenance projects generally valued at
less than $100,000 each. These contracts  typically are awarded on a competitive
bid basis,  although  customers  are  sometimes  willing to  negotiate  contract
extensions  beyond  their  original  terms  without  opening them up to bid. The
Company  currently has 20 master  contracts  with  telecommunications  customers
covering defined regions within the United States, including 12 with BellSouth.

         In addition  to services  rendered  pursuant to master  contracts,  the
Company  provides  outside plant  services on individual  projects  awarded on a
competitive  bid basis or through  individual  negotiation.  While such projects
generally  are  substantially  larger than the  individual  projects  covered by
master contracts,  they typically require the provision of services identical to
those rendered under master contracts.

         The  Company  also   provides   turn-key  site   acquisition,   design,
installation and maintenance services to the wireless  communications  industry,
including  site  acquisition  and   preparation,   design  and  construction  of
communications  towers,   placement  of  antennas  and  associated  wiring,  and
construction of equipment huts.

         The Company  provides outside plant  construction  services to electric
power  companies  and  other  public  utilities,  including  the City of  Austin
Electric   Department,   City  Public  Service  of  San  Antonio,   Duke  Energy
Corporation,  Florida  Power  and  Light  Company,  Florida  Power  Corporation,
Jacksonville  Electric Authority,  Memphis Light, Gas and Water Division,  Texas
Utilities  Company,  Carolina  Power & Light Co.,  and Georgia  Power Co., and a
number  of  regional  electrical   cooperatives.   These  services,   which  are
substantially    similar   to   the   outside   plant   services   provided   to
telecommunications  companies, include directional boring for conduit and pipes,
trenching,  placing of electric  cables,  and  restoring  asphalt  and  concrete
surfaces.  Services to many of these  customers  are  provided  under  exclusive
master contracts with two to three year initial terms expiring at various dates.

         Inside Premises Construction. The Company provides design, installation
and maintenance of integrated  voice,  data and video networks inside  buildings
for large  companies with multiple  locations such as First Union National Bank,
IBM and Dean Witter  Reynolds Inc., for college  campuses such as the University
of  California  at  Riverside  and the  University  of Miami and for health care
providers  such as Carolina  Medical Center and Kaiser  Permanente.  The Company
provides  these  services  primarily  on the east and west  coasts of the United
States although the Company is capable of providing these services nationwide.

         Inside wiring services consist of designing, installing and maintaining
local  area  networks  and wide  area  networks  linking  the  customers'  voice
communications  networks  at  multiple  locations  with  their  data  and  video
services.  This type of work is  similar  to outside  plant  construction;  both
involve  the placing and  splicing  of copper,  coaxial and fiber optic  cables.
Inside  wiring is less capital  intensive  than outside plant  construction  but
requires a more technically proficient work force.

         The Company  contracts with primary  contractors to provide services to
First Union National Bank and IBM under  subcontracts that are similar to master
contracts  in the  outside  plant  business  because  they grant the Company the
exclusive  right to provide  inside wiring  services to these  customers  within
certain geographic regions.  The Company also provides inside wiring services on
individual  projects  that are  awarded  on a  competitive  bid basis or through
individual   negotiation.   The  Company   intends  to  take  advantage  of  the
fragmentation  of the inside wiring industry by marketing a full range of inside
wiring  services  to large  corporations  with  multiple  locations  across  the
country.  The Company  believes that these types of customers  increasingly  are
seeking a single vendor to provide all of their inside wiring.

         The Company is one of two distributors in the United States, Canada and
Mexico of a fiber optic cable installation technology known as FutureFlex.  This
technology  allows the  installation  of individual  strands of optical fiber by


                                       5


means of compressed gas blown through  flexible  tubing without the necessity of
cutting or splicing the cable except at the terminal  points.  As a result,  the
network can be expanded, changed or moved more easily and cost-effectively.

Telecommunications Construction - International Operations

         Overview.  The Company is engaged in the  telecommunications  and other
utility construction business internationally,  a wholly owned subsidiary of the
Company,  primarily in Argentina,  Brazil,  Chile, Peru and Spain through Sintel
and its  affiliates  and MasTec  Inepar.  Sintel is a Spanish  company  that has
provided telecommunications construction services to Telefonica and Telefonica's
affiliates  since 1950.  Telefonica is the principal  provider of local and long
distance telephony in Spain.  Through its affiliate,  Telefonica  Internacional,
S.A.,  Telefonica  owns  interests  in  certain  local  telephone  companies  in
Argentina,  Brazil,  Chile and Peru.  Through Sintel, the Company is the leading
provider of  telecommunications  infrastructure  services to Telefonica  and its
affiliates  in Spain,  and one of the  leading  providers  of these  services to
Telefonica's affiliates in Argentina, Chile and Peru.

         The Company renders telecommunications  construction services in Brazil
through MasTec Inepar,  a Brazilian  company owned 51% by the Company and 49% by
Inepar SA Industrias e Construcoes ("Inepar"), a leading  telecommunications and
power  infrastructure and equipment company in Brazil.  MasTec Inepar was formed
in July 1997 to take  advantage  of  construction  opportunities  created by the
privatization,    de-monopolization    and   deregulation   of   the   Brazilian
telecommunications market.

         Spanish Operations.  In Spain, Sintel's principal business is providing
outside plant  services,  inside wiring  services and equipment  installation to
Telefonica and its affiliates. These services are substantially similar to those
provided by the Company in the United  States.  Sintel also installs  Telefonica
telephone  equipment in residences and businesses.  Sintel's Spanish  operations
are  concentrated  in Spain's largest  commercial  centers,  Madrid,  Barcelona,
Seville  and  Valencia,  and  surrounding  areas,  although  Sintel  maintains a
presence throughout Spain.

         Sintel provides the largest  percentage of  Telefonica's  outside plant
services  requirements.  Sintel  provides the bulk of these services under three
separate  multi-year  comprehensive  services  contracts,  which are  similar to
master  contracts  in the United  States,  for distinct  types of outside  plant
services: (i) placement and splicing of communications lines; (ii) trenching and
placing  of  conduits;  and  (iii)  placing  of drop  lines  to  residences  and
businesses.  These  agreements  set the unit prices at which  Sintel will render
services to Telefonica and establish the percentage of Telefonica's requirements
in these  categories  that will be satisfied by Sintel in particular  geographic
areas of Spain.  These three  contracts  expire at the end of 1998;  the Company
expects to  negotiate  new  comprehensive  services  contracts  with  Telefonica
beginning  in October  1998.  Telefonica  enters into  similar  agreements  with
Sintel's  principal  competitors in Spain.  The Company believes that Telefonica
considers  various  factors in awarding these contracts and setting their terms,
including   price,   quality,   technical   proficiency  and  the   contractor's
relationship with Telefonica. Telefonica also awards individual projects through
a competitive bidding process or through individual negotiation.

         In addition to outside plant  services,  Sintel  provides inside wiring
services to Telefonica that are  substantially  similar to those provided by the
Company in the United  States.  Sintel  also  installs  transmission  equipment,
central office  switching  equipment,  power  generating  equipment and cellular
equipment for telecommunications systems for Telefonica. This equipment includes
multiplexers,   carrier  systems  and  microwave  systems,  and  central  office
equipment  such as frames,  protectors,  connector  blocks,  batteries and power
systems,  and cellular  antennas and cell sites. The contracts for this work are
awarded on a competitive bid basis or through individual negotiation.

         Telefonica  is the  principal  provider  of  local  and  long  distance
telephony  in Spain.  As a result of  European  Union  initiatives,  Spain  must
liberalize  its  telecommunications  industry  by  December  1,  1998 to  permit
competitors  to  Telefonica.  In July 1997, a second  license to provide  public
switched  telephony was awarded to  Retevision,  S.A.  ("Retevision"),  which is
owned  partly by the Spanish  government,  Societa  Finanziaria  Telefonica  per
Azioni SpA  ("STET"),  an Italian  telephone  company,  and Empresa  Nacional de
Electricidad,  S.A., a Spanish electric  utility  company.  Retevision has begun
providing  local telephony in Spain in 1998, and a third local and long distance
telephony  license is  expected  to be awarded by may 30,  1998.  By December 1,
1998, it is expected that the industry will be completely  open to  competition.
The Company  believes that the increased  competition  in the Spanish  telephony
market will increase  demand for outside plant  services in Spain as new service
providers  build  competing  networks.   The  Company  has  commenced  providing
telecommunications construction services to Retevision.


                                       6


         Sintel also  installs  and  maintains  cable  television  networks  for
Telefonica and its affiliates and for Retevision.  The Spanish cable  television
market  has been  underdeveloped  due to the lack of a legal  structure  for the
provision  of cable  telecommunications  services  in  Spain.  In 1997,  a legal
structure for the provision of these  services was completed and 21 new licenses
to provide cable  television  services have been awarded and applications for 13
additional  licenses are  pending.  In  addition,  as of January 1, 1998,  cable
operators are entitled to provide local telephony  within their service areas as
well as long distance  telephony.  The Company  anticipates  that the demand for
construction   services  to  the  cable   television   industry   will  increase
significantly  as  new  networks  are  constructed  and  existing  networks  are
upgraded.  Sintel  also  has  begun  providing  infrastructure  services  to the
electric  power  industry  through  a  recently  formed  joint  venture  with  a
Portuguese electrical contractor.

         Argentina,  Chile, Peru Operations.  The Company operates in Argentina,
Chile and Peru through unconsolidated  subsidiaries in which the Company holds a
50%  interest.  The  other  50%  interests  in  these  subsidiaries  are held by
established local infrastructure  construction companies and operational control
is shared by the Company and its local  partner.  In  Argentina  and Chile,  the
Company's  partner  is a  subsidiary  of  Sociedad  Macri,  one of  the  largest
commercial  groups in Argentina.  In Peru, the Company's partner is a subsidiary
of Grana y Montero,  S.A., a leading construction company in Peru. The principal
shareholder  of Grana y  Montero,  S.A.,  is a  shareholder  and a  director  of
Telefonica del Peru. The Company's Latin American  affiliates  primarily provide
outside plant services,  cable  television  installation and similar services to
Telefonica's local telephone company affiliate in each of the countries in which
the  affiliate is located:  Telefonica  de Argentina in  Argentina;  Compania de
Telefonos de Chile in Chile;  and  Telefonica  del Peru in Peru.  As part of the
agreement  with Sociedad  Macri for the  acquisition of its interest in Sintel's
Argentine affiliate,  Sociedad Macri has contributed to the affiliate certain of
its telecommunications  construction contracts with Telecom de Argentina,  S.A.,
the principal provider of local telephony in northern Argentina.

         Brazilian Operations. MasTec Inepar, a Brazilian company, was formed in
July  1997  by  the  Company  and  Inepar.  As  part  of the  formation,  Inepar
transferred   the   personnel,   qualifications   and   other   assets   of  its
telecommunications   construction   division  to  MasTec  Inepar  together  with
contracts for specific projects with prices totaling approximately $280 million.
These  contracts  cover the  provision of outside  plant  services for the local
exchange    subsidiaries   of   Telebras,    the   Brazilian    government-owned
telecommunications  company,  particularly in Sao Paulo, Rio de Janeiro,  Parana
and other states in the more populous and developed  southern  region of Brazil.
MasTec Inepar also provides  services to CRT, the local telephone company in Rio
Grande do Sul which is partly owned by  Telefonica.  The  services  provided are
principally outside plant services for wireless communications networks.

Telecommunications Investments

         The  Company  has  invested  in certain  telecommunications  businesses
located in or servicing  Latin  America.  These  include  minority  interests in
Supercanal Holding,  S.A.  ("Supercanal") and related entities,  which operate a
cable  television  system  in  Argentina,   and  in  Consorcio   Ecuatoriano  de
Telecomunicaciones,  S.A.  ("Conecel"),  an  Ecuadorian  cellular  company.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations."  The  Company  also  recently  acquired  a license in  Paraguay  to
construct and operate a nationwide personal  communication  system ("PCS"),  and
has  reached  agreement  with  Inepar,  its partner in MasTec  Inepar,  and with
Sociedad  Macri,  its partner in Argentina and Chile, to share in development of
the system.  The agreement  with Inepar and Sociedad  Macri  regarding  Paraguay
provides that MasTec Inepar will construct the system.

Sales and Marketing

         Executives of the Company's outside plant  subsidiaries  market outside
plant  services to existing and potential  telecommunications  and other utility
customers in order to negotiate  new  contracts or be placed on lists of vendors
invited  to  submit  bids  for  master  contracts  and  individual  construction
projects.  Inside  premises  services are marketed both by the executives of the
subsidiaries  that provide these services and through  commissioned  salespeople
employed by the Company. The Company is developing a company-wide marketing plan
to emphasize the "MasTec" brand name to national and international customers.


                                       7


Suppliers

         The  Company's  customers  supply the majority of the raw materials and
supplies  necessary to carry out the Company's  contracted  work. The Company is
not  dependent on any one supplier  for any raw  materials or supplies  that the
Company  obtains for its own account other than the  FutureFlex  airblown  fiber
product that the Company distributes for Sumitomo Electric Lightwave Co.

Competition

         The industry in which the Company  competes is highly  competitive  and
fragmented.  The Company competes with a number of contractors in the markets in
which it operates,  ranging from small independent firms servicing local markets
to larger firms servicing  regional markets,  as well as with large national and
international   equipment   vendors  on  turn-key   projects   who   subcontract
construction work to contractors other than the Company. These equipment vendors
typically are better  capitalized  and have greater  resources than the Company.
Most  companies  engaged  in the same or similar  business  tend to operate in a
specific,  limited  geographic  area,  although larger  competitors may bid on a
particular project without regard to location.  Although the Company believes it
is the largest provider of infrastructure services to the telecommunications and
other  utilities  industry in the United States and Spain and one of the largest
in  Argentina,  Brazil,  Chile  and Peru,  neither  the  Company  nor any of its
competitors  can  be  considered  dominant  in the  industry  on a  national  or
international  basis.  The  Company  also faces  competition  from the  in-house
construction  and  maintenance  departments  of RBOCs  and other  customers  and
potential  customers,  which employ personnel who perform some of the same types
of services as those provided by the Company.

Employees

         As of December  31, 1997,  the Company  (excluding  its  unconsolidated
companies)  had  approximately  7,850  employees,  4,600 of whom are employed in
domestic operations and 3,250 of whom are employed in international  operations.
Approximately 100 of the Company's domestic employees and approximately 3,200 of
Sintel's employees are unionized.  See "Management's  Discussion and Analysis of
Financial  Condition  and Results of  Operations  Overview"  for a discussion of
Sintel's labor relations.


                                  2. PROPERTIES

         The  Company's  corporate  headquarters  are located in a 60,000 square
foot  building  owned by the Company in Miami,  Florida.  The  Company  also has
regional offices in owned facilities located in Tampa,  Florida,  Austin,  Texas
and Charlotte, North Carolina.  Sintel's principal executive offices are located
in leased  premises in Madrid,  Spain and MasTec  Inepar's  principal  executive
offices are located in leased premises in Sao Paulo, Brazil.

         The Company's  principal  operations  are conducted from field offices,
equipment  yards and  temporary  storage  locations,  none of which the  Company
believes is material to its  operations  because most of the Company's  services
are  performed  on the  customers'  premises  or on  public  rights  of way.  In
addition,  the Company believes that equally suitable alternative  locations are
available in all areas where it currently does business.


                              3. LEGAL PROCEEDINGS

         The following is a summary of legal proceedings involving the Company.

         In December 1990, Albert H. Kahn, a stockholder of the Company, filed a
class action and  derivative  suit in Delaware  state court against the Company,
the  then-members  of its Board of Directors and National  Beverage  Corporation
("NBC"), the Company's  then-largest  stockholder.  The complaint alleges, among
other  things,  that the  Company's  Board of Directors  and NBC breached  their
respective fiduciary duties in approving certain transactions. The lawsuit seeks
to rescind these transactions and to recover damages in an unspecified amount.

         In  November  1993,  Mr.  Kahn  filed a  class  action  and  derivative
complaint against the Company,  the then members of its Board of Directors,  and
Jorge L. Mas, Jorge Mas and Juan Carlos Mas, the principal  shareholders  of the
Company.  The lawsuit alleges,  among other things,  that the Company's Board of
Directors and NBC breached their  respective  fiduciary  duties by approving the
terms of the  acquisition  of the  Company by the Mas  family,  and that the Mas
family had knowledge of the fiduciary duties owed by NBC and the Company's Board


                                       8


of Directors and knowingly and substantially participated in the breach of these
duties.  The lawsuit also claims  derivatively that each member of the Company's
Board of  Directors  engaged in  mismanagement,  waste and  breach of  fiduciary
duties in managing the  Company's  affairs prior to the  acquisition  by the Mas
family.

         There has been no activity in either of these lawsuits in more than one
year.  The Company  believes that the  allegations in each of these lawsuits are
without merit and intends to defend these lawsuits vigorously.

         In November 1997,  Church & Tower,  Inc., a wholly-owned  subsidiary of
the Company ("Church & Tower"),  filed a lawsuit against  Miami-Dade County (the
"County") in Florida state court alleging breach of contract and seeking damages
exceeding  $3.0 million in connection  with the County's  refusal to pay amounts
due to Church & Tower under a multi-year  agreement to perform road  restoration
work for the Miami-Dade Water and Sewer Department ("MWSD"), a department of the
County, and the County's wrongful  termination of the agreement.  The County has
refused to pay amounts due to Church & Tower under the  agreement  until alleged
overpayments  under the agreement  have been  resolved,  and has  counterclaimed
against Church & Tower seeking damages.  The Company believes the  counterclaim,
if  successful,  will not exceed  $2.1  million.  The County also has refused to
award a new road restoration agreement for MWSD to Church & Tower, which was the
low bidder for the new agreement.  The Company  believes that any amounts due to
the County under the existing  agreement are not material and may be recoverable
in whole or in part from Church & Tower  subcontractors  who actually  performed
the work and whose bills were submitted directly to the County.

         The Company is a party to other  pending legal  proceedings  arising in
the normal course of business, none of which the Company believes is material to
the Company's financial position or results of operations.


             4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

         There was no vote of security  holders during the fourth quarter of the
last fiscal year.


                      EXECUTIVE OFFICERS OF THE REGISTRANT

         The  following is a list of the names and ages of all of the  executive
officers of the Company,  indicating  all positions and offices with the Company
held by each  such  person,  and each  such  person's  principal  occupation  or
employment  during the past five years.  The executive  officers hold office for
one year or until their successors are elected by the Board of Directors.


    Name                 Age                    Position

Jorge Mas                35      Chairman of the Board of Directors,
                                    President and Chief Executive Officer
Henry N. Adorno          50      Executive Vice President and Special Counsel
Ismael Perera            49      Senior Vice President-Operations
Edwin D. Johnson         41      Senior Vice President-Chief Financial Officer
Carlos A. Valdes         34      Senior Vice President-Corporate Development
Jose M. Sariego          43      Senior Vice President-General Counsel

         Jorge Mas has been President, Chief Executive Officer and a director of
the Company since March 1994 and was elected  Chairman of the Board of Directors
of the Company in January 1998. Prior to that time and during the preceding five
years,  Mr. Mas served as the President and Chief Executive  Officer of Church &
Tower.  In  addition,  Mr. Mas is the Chairman of the Board of Directors of Neff
Corporation,  a company that sells and leases construction  equipment,  Atlantic
Real Estate  Holding  Corp., a real estate  holding  company,  U.S.  Development
Corp., a real estate  development  company and Santos Capital,  Inc., a merchant
banking firm (all private companies controlled by Mr. Mas) and, during all, or a
portion of the past five years,  has served as the President and Chief Executive
Officer of these corporations.


                                       9


         Henry N.  Adorno was  elected  Executive  Vice  President  and  Special
Counsel of the Company in January 1998. Prior to joining the Company, Mr. Adorno
was President and Chief Executive  Officer of Adorno & Zeder,  P.A., a Miami law
firm that he co-founded in 1986.

         Ismael Perera has been Senior Vice  President-Operations of the Company
since  March 1994.  From  August  1993 until  March 1994,  he served as the Vice
President-Operations  of Church & Tower.  From 1970 until July 1993,  Mr. Perera
served in various capacities in network operations for BellSouth, including most
recently as a Senior Director of Network Operations from 1985 to 1993.

         Edwin D. Johnson has been Senior Vice President-Chief Financial Officer
of the  Company  since  March  1996.  During the 10 years  prior to joining  the
Company,  Mr. Johnson served in various  capacities with Attwoods plc, a British
waste services  company,  including  Chief  Financial  Officer and member of the
Board of Directors during the final three years of his employment with Attwoods.

         Carlos A. Valdes has been Senior Vice  President-Corporate  Development
of the Company since March 1996.  Prior to that time, Mr. Valdes was Senior Vice
President-Finance  of the  Company  from  March  1994 to March  1996  and  Chief
Financial Officer of Church & Tower from 1991 to 1994.

         Jose M. Sariego has been Senior Vice  President-General  Counsel of the
Company since  September  1995.  Prior to joining the Company,  Mr.  Sariego was
Senior  Corporate  Counsel and  Secretary  of Telemundo  Group,  Inc., a Spanish
language television network,  from August 1994 to August 1995. From January 1990
to August 1994,  Mr.  Sariego was a partner in the Miami office of Kelley Drye &
Warren, an international law firm.


                  5. MARKET FOR THE REGISTRANT'S COMMON EQUITY
                         AND RELATED STOCKHOLDER MATTERS

         The  Company's  Common Stock  currently is listed on the New York Stock
Exchange  under the symbol MTZ. Prior to February 14, 1997, the Common Stock was
listed on the Nasdaq  National  Market under the symbol  MASX.  The high and low
closing  prices of the  Common  Stock for each  quarter  of the last two  fiscal
years,  as reported  by the New York Stock  Exchange  and Nasdaq,  are set forth
below:


                                                                                         

                                                        1997                                   1996
                                              High               Low                  High             Low

First Quarter                              $ 68   7/8          $ 23                $ 12 5/8         $  9 1/2
Second Quarter                             $ 47 15/16          $ 26 1/2            $ 35 3/4         $ 11 3/8
Third Quarter                              $ 54   3/8          $ 39                $ 38 3/8         $ 21 1/2
Fourth Quarter                             $ 45  1/16          $ 20 3/4            $ 57 3/4         $ 32 5/8


         The above quotations reflect  interdealer  prices,  without retail mark
up,  mark  down  or  commission,   and  may  not  necessarily  represent  actual
transactions.  The Company's Board of Directors  declared a three-for-two  stock
split in the form of a stock dividend for  stockholders of record on February 3,
1997 payable on February 28, 1997.  The prices set forth in the preceding  table
have not been adjusted for the stock split. The Company did not declare any cash
dividends for the years ended December 31, 1997 and 1996.

         At March 20,  1998,  there  were  4,752  stockholders  of record of the
Common Stock.

         On January  30,  1998,  the Company  issued $200  million of its 7 3/4%
Senior   Subordinated   Notes  due  2008  (the  "Senior   Notes")  to  qualified
institutional buyers and institutional  accredited investors in reliance on Rule
144A and pursuant to  exemptions  from  registration  under  Section 4(2) of the
Securities Act of 1933, as amended.  The initial purchasers for the Senior Notes
sold  to  the  qualified  institutional  buyers  and  institutional   accredited
investors were  Jefferies & Company,  Inc.,  BancBoston  Securities  Inc.,  CIBC
Oppenheimer  Corp. and NationsBanc  Montgomery  Securities LLC. The net proceeds
from the offering of the Senior Notes were  approximately  $194.2  million after
underwriting  discounts and commissions of approximately  $5.0 million and other
transaction costs.


                                       10



                        6. SELECTED FINANCIAL INFORMATION

         The  following   table   presents   selected   consolidated   financial
information  of  the  Company  as of the  dates  and  for  each  of the  periods
indicated.  The  selected  financial  data set  forth  below  should  be read in
conjunction with the Consolidated  Financial  Statements,  the notes thereto and
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations" included elsewhere in this Annual Report on Form 10-K.



                                                            Year Ended December 31, (1)
                                                            ---------------------------
                                                                                   
                                            1993         1994 (2)      1995        1996 (3)      1997
                                         --------------------------------------------------------------      
                                                   (Amounts in thousands except per share amounts)
                                         --------------------------------------------------------------
Statement of Income Data:
Revenue                                  $ 74,728      $ 142,583    $ 218,859    $ 534,068    $ 703,369
Cost of revenue                            51,763        105,451      158,598      394,497      522,470
Depreciation and amortization               1,520          5,545        8,178       13,686       24,127
General and administrative expenses        15,681         20,595       28,918       72,392       90,995
                                           ------        -------      -------      -------      -------
Operating income                            5,764         10,992       23,165       53,493       65,777
Interest expense                              302          3,846        5,306       11,940       11,920
Interest and dividend income                  359          1,550        3,501        3,480        1,921
Special charges-real estate and
   investment write-downs (4)                   0              0       23,086            0            0
Other income, net (5)                         355          1,348        2,250        2,553        8,221
Equity in earnings (losses) of
   unconsolidated companies and
   minority interest (6)                    1,177            247         (139)       3,133         (449)
Provision for income taxes (7)              2,765          3,541          148       17,492       23,610
Income from continuing operations (7)       4,588          6,750          237       33,227       39,940
Discontinued operations                         0            825        2,531         (111)         129
                                           ------        -------      -------      -------      -------
Net income                               $  4,588      $   7,575    $   2,768    $  33,116    $  40,069
                                           ======        =======      =======      =======      =======

Pro forma basic earnings per share:
   Continuing operations (7)             $   0.27      $    0.26    $    0.01    $   1.27     $    1.46
   weighted average common
   shares outstanding (8)                  16,746         25,487       25,263      26,074        27,294
Pro forma diluted earnings per share:
   Continuing operations (7)             $   0.27      $    0.26    $    0.01    $   1.25     $    1.43
   weighted average common
   shares outstanding (8)                  16,746         25,487       25,440      26,499        27,853




                                                                As of December 31,
                                                                ------------------
                                                                                   
                                            1993          1994         1995         1996         1997
                                            ---------------------------------------------------------
                                                             (Amounts in thousands)
Balance Sheet Data:
Property and equipment, net               $ 8,038       $ 44,157     $ 50,572     $ 67,177      $ 86,109
Total assets                               32,988        155,969      191,272      511,154       587,598
Total debt                                  5,545         46,977       77,668      164,934       149,057
Total stockholders' equity                 16,396         57,270       60,614      116,983       180,731
<FN>

(1)      Amounts have been restated to reflect the 1997 acquisitions of Wilde  
         Construction,  Inc. and two related companies and AIDCO, Inc. and one
         related company,  which were accounted for as poolings of interest. 
         See Note 2 of Notes to Consolidated Financial Statements.
(2)      Includes the results of Burnup & Sims Inc. from March 11, 1994.
(3)      Includes the results of Sintel from May 1, 1996.
(4)      As a result of the  disposal of non-core  real estate  assets and other
         investments,  the Company  recorded $23.1 million in special charges in
         the year ended  December 31, 1995.  See  "Management's  Discussion  and
         Analysis of Financial Condition and Results of Operations".
(5)      In 1997, the Company sold a portion of its indirect interest in Conecel
         for a gain of $7.1 million.  See Note 2 of Notes to Consolidated 
         Financial Statements.


                                       11


(6)      Included  in 1997  results  is the  minority  interest  related  to the
         Company's Brazilian operation.  See Note 2 to Notes to the Consolidated
         Financial Statements.
(7)      Provision for income taxes and income from  continuing  operations have
         been adjusted to reflect a pro forma tax  provision for companies  that
         were previously S Corporations.
(8)      Amounts  have been  adjusted to reflect the  three-for-two  stock split
         effected  February 28, 1997 and shares  issued in  connection  with two
         acquisitions accounted for under the pooling of interest method.

</FN>



                     7. MANAGEMENT'S DISCUSSION AND ANALYSIS
                OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Overview

         MasTec is one of the world's  largest  contractors  specializing in the
build-out  of  telecommunications  and  other  utilities   infrastructure.   The
Company's  business consists of the design,  installation and maintenance of the
outside physical plant for telephone and cable television communications systems
and of  integrated  voice,  data and video local and wide area  networks  inside
buildings, and the installation of central office telecommunications  equipment.
The Company also provides  infrastructure  construction services to the electric
power industry and other public utilities.

         MasTec was formed in March 1994  through  the  combination  of Church &
Tower and Burnup & Sims Inc.  ("Burnup & Sims"),  two  established  names in the
U.S.  telecommunications  and other utilities construction services industry. In
April   1996,   the   Company   purchased   Sintel,   a   company   engaged   in
telecommunications  infrastructure  construction  services in Spain,  Argentina,
Chile and Peru,  from  Telefonica.  The Sintel  acquisition  gave the  Company a
significant international presence and more than doubled the size of the Company
in terms of revenue and number of employees.  In Argentina,  Chile and Peru, the
Company operates through incorporated  entities in which it holds a 50% interest
and which are accounted  under the equity method.  Operational  control of these
entities is shared by the Company  and its local  partner.  See Notes 2 and 9 of
Notes to Consolidated  Financial Statements for pro forma financial  information
and geographic information, respectively.

         In July and August 1997,  the  Company  acquired  Wilde  Construction, 
Inc.  and  two  related  companies  and  AIDCO, Inc. and  one  related  company
(collectively,  the "Pooled  Companies")  through  an exchange of common  stock.
The acquisitions  were  accounted  for  as  poolings of  interest.  Accordingly,
the Company's  consolidated  financial statements  include  the  results  of the
Pooled  Companies  for  all  periods  presented.  See  Note 2  of Notes   to
Consolidated Financial Statements.

         In July 1997, the Company  acquired a 51% interest in MasTec Inepar,  a
Brazilian telecommunications infrastructure construction company. At the time of
the  acquisition,  MasTec  Inepar had a backlog  of  construction  contracts  of
approximately  $280.0 million.  The results of MasTec Inepar are consolidated in
the results of the Company,  net of a 49% minority  interest,  beginning  August
1997.

         During the year ended  December 31, 1997,  the Company  completed  nine
other  acquisitions  that have been  accounted for under the purchase  method of
accounting  and the  results of  operations  of which have been  included in the
Company's  consolidated  financial  statements  from the respective  acquisition
dates.  The Company's pro forma results of operations  for 1997 giving effect to
these acquisitions would not differ materially from actual results.

         On September 3, 1997,  Sintel filed a petition  with the Spanish  labor
authorities  to approve a  restructuring  of its  workforce.  In response to the
Company's  petition,  the unionized employees declared work stoppages during the
latter part of September  1997 and continued  with half day strikes  through the
first week in October 1997.

         In March 1998,  Sintel  entered  into an  agreement  with its unions to
resolve  the labor  dispute.  Under the  agreement,  the  Company is entitled to
permanently reduce its workforce,  beginning with the placement of 209 employees
on  unemployment  partly  paid by the Spanish  government  for up to six months.
Additional  voluntary  terminations  and the  results  of  certain  agreed  upon
restructuring  activities  will allow the  Company to quantify  final  severance
arrangements over that period.  In addition,  the agreement calls for reductions
in certain non-wage compensation and increases in productivity  benchmarks.  The
agreement also  contemplates  an increase in base wage rates for remaining union
workers.  While management anticipates a reduction in ongoing operating costs to
result  from these  negotiations,  the  Company  recognizes  that it services an


                                       12


increasingly  competitive  telephony  industry  in  the  Spanish  market  and  a
substantial  portion of any savings may be offset by more competitive  prices to
Telefonica and other communication  service customers.  As of December 31, 1997,
the Company had not reserved for possible  restructuring costs associated with a
settlement  of  the  Sintel  labor  situation  in  its  consolidated   financial
statements.  The Company is currently  negotiating  with its unions to determine
the final number of employees and related severance amounts. The ultimate amount
to be paid, which is expected to be significant, cannot be presently quantified.

Results of Operations

         Revenue  is  generated  primarily  from  telecommunications  and  other
utilities  infrastructure  services.  Infrastructure  services  are  provided to
telephone  companies,   public  utilities,  cable  television  operators,  other
telecommunications  providers,  governmental  agencies  and private  businesses.
Costs of  revenue  includes  subcontractor  costs and  expenses,  materials  not
supplied by the customer, fuel, equipment rental, insurance,  operations payroll
and employee benefits.  General and  administrative  expenses include management
salaries and benefits, rent, travel, telephone and utilities,  professional fees
and clerical and administrative overhead.

         The  following  table  sets  forth  certain   historical   consolidated
financial data as a percentage of revenue for the years ended December 31, 1995,
1996 and 1997.



                                                                           Years Ended December 31,
                                                                     ----------------------------------
                                                                                           
                                                                     1995           1996           1997
                                                                     ----           ----           ----

Revenue                                                             100.0%         100.0%          100.0%
Costs of revenue                                                     72.5           73.9            74.3
Depreciation and amortization                                         3.7            2.6             3.4
General and administrative expenses                                  13.2           13.6            12.9
                                                                     ----           ----            ----
Operating income                                                     10.6            9.9             9.4

Interest expense                                                      2.4            2.2             1.7                            
Interest and dividend income, other income,                           
   net, equity in earnings of unconsolidated
   companies and minority interest                                    2.6            1.7             1.4
Special charges-real estate and investment
   write-downs                                                       10.6            0.0             0.0
                                                                     ----           ----            ----
Income from continuing operations before provision
   for income taxes                                                   0.2            9.4             9.1
Provision for income taxes (1)                                        0.1            3.2             3.4
                                                                     ----           ----            ----
Income from continuing operations (1)                                 0.1%           6.2%            5.7%
                                                                     ====           ====            ====
<FN>

         (1)      Provision   for  income  taxes  and  income  from   continuing
                  operations  has been  adjusted to reflect a tax  provision for
                  companies that were S corporations.
</FN>


Year Ended December 31, 1997 Compared to Year Ended December 31, 1996

         Revenue from domestic operations  increased $75.1 million, or 21.7%, to
$421.0  million in 1997 as compared to $345.9 million in 1996.  Domestic  growth
was generated by acquisitions.  Revenue  generated by  international  operations
increased  $94.2  million,  or 50.1%,  to $282.4  million in 1997 as compared to
$188.2  million in 1996 due primarily to the  inclusion of Sintel's  results for
the entire  period in 1997  compared to eight  months in the 1996 period and the
results of MasTec Inepar for five months ended December 31, 1997,  which totaled
$74.9  million.  Sintel's  revenue  was  negatively  impacted  in 1997 by an 18%
devaluation  in the Spanish  peseta and by work  stoppages in the second half of
1997 as discussed in "Overview".

         Gross profit (revenue less cost of revenue), excluding depreciation and
amortization,  increased $41.3 million, or 29.6%, to $180.9 million, or 25.7% of
revenue in 1997 as compared to $139.6 million,  or 26.1% of revenue in 1996. The
decrease in gross profit as a percentage  of revenue was due  primarily to lower
margins  generated by  international  operations.  Domestic gross margins (gross
profit as a percentage of revenue) increased to 27.4% in 1997 from 25.1% in 1996
primarily due to the  performance of certain higher margin  domestic jobs during
1997 and domestic cost  reductions.  There can be no assurance  that the Company
will be able to obtain higher margin jobs and implement  further cost reductions
in the  future.  International  gross  margins  decreased  to  23.2%  in 1997 as
compared to 28.0% in 1996 due to overall lower margins from the Company's  newly
formed Brazilian operations (15.0%) and lower productivity in the second half of
1997 from the Company's Spanish operations.


                                     13


         Depreciation  and  amortization  increased $10.4 million,  or 75.9%, to
$24.1 million in 1997 from $13.7 million in 1996.  The increase in  depreciation
and  amortization was a result of increased  capital  expenditures in the latter
part  of  1996,  as  well  as  depreciation  and  amortization  associated  with
acquisitions. As a percentage of revenue, depreciation and amortization was 3.4%
and 2.6% of revenue for 1997 and 1996, respectively.

         General and administrative  expenses increased $18.6 million, or 25.7%,
to $91.0 million,  or 12.9% of revenue for 1997 from $72.4 million,  or 13.6% of
revenue  for 1996.  Domestic  general  and  administrative  expenses  were $49.9
million,  or 11.9% of domestic  revenue in 1997,  compared to $41.4 million,  or
12.0% of domestic  revenue for 1996.  The increase in dollar  amount of domestic
general  and  administrative  expenses is due  primarily  to  acquisitions.  The
decline as a  percentage  of  domestic  revenue is due  primarily  to the higher
revenue volume.  International  general and  administrative  expenses  increased
$10.1 million, or 32.6%, to $41.1 million, or 14.6% of international  revenue in
1997 from  $31.0  million,  or 16.5% of  international  revenue  for  1996.  The
increase in  international  general and  administrative  expenses was due to the
inclusion of Sintel's results for the entire 1997 period, compared to only eight
months  during  the 1996  period.  The  decline  in  international  general  and
administrative  expenses as a percentage  of  international  revenue is due to a
lower general and administrative expense for the Brazilian operations, which was
2.2% of Brazilian revenue.

         Operating income increased $12.3 million,  or 23.0%, to $65.8 million, 
or 9.4% of revenue in 1997 from $53.5 million, or 9.9% of revenue in 1996.

         Interest expense remained  constant at $ 11.9 million for both periods,
primarily due to the lower interest rates on Spanish and domestic borrowings and
the conversion of the Company's 12%  Subordinated  Convertible  Debentures  into
Common  Stock on June 30,  1996.  Offsetting  the decline was the  inclusion  of
interest  expense  associated with Sintel's working capital needs for the entire
1997  period  compared  to  eight  months  for  the  1996  period.  The  Company
anticipates  increased  interest  expense as a result of its recently  completed
bond offering. See -"Financial Condition, Liquidity and Capital Resources."

         Included in other  income for 1997,  is a $7.1  million gain on sale of
the Company's  indirect  interest in Conecel (See Note 2 of Note to Consolidated
Financial Statements).

         Provision for income taxes on a pro forma basis was $23.6  million,  or
36.9% of  income  from  continuing  operations  before  equity  in  earnings  of
unconsolidated  companies,  taxes and minority  interests  in 1997,  compared to
$17.5 million,  or 36.8% of income from continuing  operations  before equity in
earnings of unconsolidated companies, taxes and minority interests in 1996.

         Income from  continuing  operations on a pro forma basis increased $6.7
million,  or 20.2%,  from $33.2 million in 1996 to $39.9 million in 1997. Income
from  continuing  operations  on a pro forma  basis as a  percentage  of revenue
decreased to 5.7% in 1997 from 6.2% in 1996.

Year Ended December 31, 1996 Compared to Year Ended December 31, 1995

         Revenue increased $315.2 million,  or 144.0%, to $534.1 million for the
year ended December 31, 1996 from $218.9 million for the year ended December 31,
1995. Domestic revenue increased $127.0 million, or 58.0%, to $345.9 million for
1996 from $218.9 million for 1995,  primarily due to growth in revenue generated
from  existing  contracts and to domestic  acquisitions  completed in 1996 which
generated $23.5 million in revenue.  International revenue, comprised of revenue
from  Sintel,  which the Company  acquired in April  1996,  contributed  $ 188.2
million of revenue for the year ended December 31, 1996.

         Gross profit  (revenue less costs of revenue),  excluding  depreciation
and  amortization,  increased $79.3 million,  or 131.5%,  to $139.6 million,  or
26.1% of revenue,  for the year ended December 31, 1996 from $60.3  million,  or
27.5% of revenue,  for the year ended December 31, 1995.  Domestic gross margins
(gross profit as a percentage of revenue)  decreased to 25.1% for the year ended
December 31, 1996 from 27.5% for the year ended  December 31, 1995.  The decline
in domestic gross margins was primarily due to additional start-up and expansion
costs relating to the rapid growth in revenue.  International gross margins were
28.0% for the year ended December 31, 1996.


                                       14


         Depreciation  and  amortization  increased $5.5 million,  or 67.1%,  to
$13.7  million for the year ended  December  31, 1996 from $8.2  million for the
year ended  December 31,  1995.  Domestic  depreciation  and  amortization  as a
percentage of domestic revenue decreased to 3.4% for 1996 from 3.7% for 1995 due
to  economies  of  scale   obtained  over  a  larger   domestic   revenue  base.
International  depreciation and  amortization was 1.1% of international  revenue
for the year ended December 31, 1996, as the Company's international  operations
are less capital intensive than the Company's domestic operations.

         General and administrative expenses increased $43.5 million, or 150.5%,
to $72.4 million,  or 13.6% of revenue for the year ended December 31, 1996 from
$28.9  million,  or 13.2% of  revenue  for the year  ended  December  31,  1995.
Domestic general and administrative  expenses increased $12.5 million, or 43.3%,
to $41.4 million, or 12.0% of domestic revenue,  for 1996 from $28.9 million, or
13.2% of  domestic  revenue  in 1995.  The  decrease  in  domestic  general  and
administrative  expenses as a percentage  of domestic  revenue is primarily  the
result of spreading  overhead expenses over a broader revenue base.  Included in
domestic general and administrative  expenses for 1996 and 1995 are salaries and
bonuses for employees of the Pooled Companies of approximately  $6.1 million and
$3.8 million,  respectively.  International general and administrative  expenses
were  $31.0  million,  or 16.5% of  international  revenue,  for the year  ended
December 31, 1996.

         Operating income increased $30.3 million,  or 130.6%, to $53.5 million,
or 9.9% of revenue,  for the year ended December 31, 1996 from $23.2 million, or
10.6% of revenue, for the year ended December 31, 1995. The decline in operating
income as a  percentage  of revenue  was due to the  decline in  domestic  gross
margins in 1996 and bonuses earned by employees of the Pooled Companies.

         Interest expense  increased $6.6 million,  or 124.5%,  to $11.9 million
for the year  ended  December  31,  1996 from $5.3  million  for the year  ended
December 31, 1995 primarily due to borrowings  used for equipment  purchases and
to  fund  investments  in  unconsolidated  companies,  offset  in  part  by  the
conversion of the Company's 12% Subordinated  Convertible Debentures into Common
Stock on June 30, 1996.

         As a result of the  decision  to  accelerate  the  disposal  of certain
non-core real estate assets and other  investments,  the Company  recorded $23.1
million in special  charges during the year ended December 31, 1995. The Company
recorded  a special  charge of $15.4  million  in the third  quarter  of 1995 to
adjust the  carrying  values of its real estate  investments  to  estimated  net
realizable  value based on offers  received by the Company to dispose of certain
real  estate in a bulk  transaction.  The  original  value  assigned to the real
estate  investments  contemplated  the  disposition  of  the  properties  on  an
individual basis and no consideration  had previously been given to a bulk sale.
In the fourth quarter of 1995, the Company recorded an additional charge of $7.7
million to reflect the value realized upon a sale of certain real estate and the
Company's  preferred stock  investment in early 1996.  These assets were sold at
prices and in a manner designed to facilitate  their immediate  disposal so that
the Company  could  concentrate  its  resources  on its core  telecommunications
construction business.

         Income  from  continuing  operations  after a pro forma  tax  provision
increased to $33.2 million, or 6.2% of revenue,  for the year ended December 31,
1996 from $0.2 million for the year ended  December 31, 1995 which  included the
special charge of $23.1 million.

         In the third quarter of 1995, the Company  adopted a plan to dispose of
certain non-core  businesses acquired as a result of the acquisition of Burnup &
Sims in March 1994. See Note 13 of Notes to Consolidated  Financial  Statements.
These businesses  included the operations of a printing company, a theater chain
and an  uninterrupted  power supply device  assembler.  During 1995, the Company
sold the assets of the theater  chain and the  assembler.  The two  transactions
netted a gain of $7.4 million after tax. The remaining  theater  operations have
been closed and are currently  being marketed for sale for the  underlying  real
estate value. Based on the estimated net realizable value of these businesses, a
loss on disposition of approximately  $6.4 million,  net of tax, relating to the
remaining  discontinued  operations  was recorded in 1995.  The Company sold the
printing company in January 1997 for its carrying value.

Financial Condition, Liquidity and Capital Resources

         The  Company's  primary  liquidity  needs are for working  capital,  to
finance  acquisitions  and capital  expenditures  and to service  the  Company's
indebtedness.  The Company's  primary  sources of liquidity  have been cash flow



                                       15


from  operations,  borrowings  under  revolving lines of credit and the proceeds
from the sale of investments and non-core assets.

         Net cash provided by operating  activities  for the year ended December
31, 1997 was $23.1  million,  compared to $41.9 million for the year ended 1996.
This  decrease  was due to  fluctuations  in  working  capital,  particularly  a
reduction of accounts payable  balances  companywide and an increase in accounts
receivable and unbilled revenue from Brazilian operations, offset by an increase
in net income to $42.7 million as compared to net income of $35.9 million in the
comparative 1996 period.

         Net  cash  provided  by the sale of  investments  and  non-core  assets
amounted to $29.6  million  for 1997  compared  to $9.4  million  for 1996.  The
Company invested cash, net of cash acquired,  in acquisitions and investments in
unconsolidated  companies  totaling  $50.2 million  during 1997 compared to $6.2
million in 1996.  During 1997,  the Company made capital  expenditures  of $23.6
million,  primarily  for  machinery  and  equipment  used in the  production  of
revenue, compared to $8.4 million in 1996.

         As of December  31,  1997,  working  capital  totaled  $123.7  million,
compared to working  capital of $136.2  million at December 31, 1996 excluding a
note  receivable  of $29.0 million which was  converted  into an  investment,  a
portion of which was sold in December 1997. See Note 2 of Notes to  Consolidated
Financial Statements. Included in working capital are net assets of discontinued
operations of $4.2 million and real estate held for sale totaling $10.9 million.

         In December 1997,  the Company sold its indirect  investment in Conecel
for $20.0 million in cash and the right to receive shares of Conecel  non-voting
common stock. The Company will have certain  registration rights with respect to
the Conecel common stock that it receives.  A gain of $4.4 million,  net of tax,
was  recognized  based on the percent of cash received to the total  transaction
value.  In September  1997, the Company agreed to sell a portion of its interest
in Supercanal for $20.0 million in cash. In January 1998, the Company elected to
retain its entire interest in Supercanal and terminated the agreement.

         The  Company   continues  to  pursue  a  strategy  of  growth   through
acquisitions  and  internal  expansion.  In July 1997,  the  Company  closed its
acquisition  of 51% of MasTec Inepar for stock and $29.4 million in cash payable
over eleven months.  In addition,  in connection with its acquisition of Sintel,
the Company is required to make payments of 1.8 billion  pesetas  (approximately
$11.8 million at the exchange rate in effect at December 31, 1997) on each of  
December 31, 1997 and 1998.  The Company has paid a portion  of the December 31,
1997  payment,  with the remaining amounts  to be paid  pending resolution of
offsetting amounts between the Company and Telefonica.  See Note 2 of Notes to 
Consolidated  Financial  Statements.  The Company believes that cash generated
from operations,  borrowings under its $125.0 million revolving credit facility 
with a  syndicate  of  banks  led by  BankBoston,  N.A. (the "Credit Facility"),
and proceeds from the sale of investments and non-core assets will be sufficient
to finance  these  payments,  as well as the  Company's  working capital  needs,
capital  expenditures  and  debt  service  obligations  for the foreseeable  
future.  Future acquisitions are expected to be financed from these sources, as
well as other external  financing sources to the extent necessary, including the
issuance of equity securities and additional borrowings.

         In June 1997, the Company  refinanced its domestic credit facility with
the Credit  Facility.  Borrowings  under this  facility may be used for domestic
acquisitions,  working  capital,  capital  expenditures  and  general  corporate
purposes.   At  December  31,  1997,  borrowings  under  this  facility  totaled
approximately  $83.0 million and standby  letters of credit  issued  pursuant to
this facility totaled  approximately $3.5 million.  In January 1998, the Company
sold $200.0 million  principal  amount of 7.75% Senior  Subordinated  Notes (the
"Notes")  due 2008 with  interest  due  semi-annually.  The  Company  repaid all
outstanding  borrowings under the Credit Facility other than outstanding letters
of credit with a portion of the proceeds of the Notes,  as a result of which the
Company has approximately  $121.5 million of borrowing capacity under the Credit
Facility.  The Credit  Facility and the Notes contain certain  covenants  which,
among other  things,  restrict  the payment of  dividends,  limit the  Company's
ability to incur  additional  debt,  create liens,  dispose of assets,  merge or
consolidate with another entity or make other  investments or acquisitions,  and
provide that the Company must maintain minimum amounts of  stockholders'  equity
and financial ratio coverages,  requiring, among other things, minimum ratios at
the end of each fiscal quarter of debt to earnings, earnings to interest expense
and accounts receivable to trade payables.  See Note 5 of Notes to Consolidated
Financial Statements.

         The Company  conducts  business in several foreign  currencies that are
subject to  fluctuations in the exchange rate relative to the U.S.  dollar.  The



                                       16


Company  does not enter into foreign  exchange  contracts.  It is the  Company's
intent to utilize foreign  earnings in the foreign  operations for an indefinite
period of time. In addition,  the Company's  results of operations  from foreign
activities are translated into U.S.  dollars at the average  prevailing rates of
exchange  during the period  reported,  which  average rates may differ from the
actual  rates of  exchange in effect at the time of the actual  conversion  into
U.S.  dollars.  The Company  currently  has no plans to  repatriate  significant
earnings from its international operations.

         The Company's  current and future operations and investments in certain
foreign countries are generally  subject to the risks of political,  economic or
social  instability,  including the possibility of  expropriation,  confiscatory
taxation,   hyper-inflation   or  other  adverse   regulatory   or   legislative
developments,  or limitations on the repatriation of investment income,  capital
and other assets.  The Company cannot  predict  whether any of such factors will
occur in the future or the extent to which  such  factors  would have a material
adverse effect on the Company's international operations.

Year 2000

         Management  believes that a significant portion of its computer systems
are year 2000  compliant  and is in the process of assessing  the balance of its
systems.  The Company  intends to  communicate  with its  customers,  suppliers,
financial institutions and others with which it does business to ensure that any
year 2000 issue will be resolved  timely.  This issue affects  computer  systems
that have time-sensitive programs that may not properly recognize the year 2000.
If necessary  modifications and conversions by those with which the Company does
business are not  completed  timely or if all of the  Company's  systems are not
year 2000 compliant,  the year 2000 issue may have a material  adverse effect on
the  Company's  consolidated  financial  position,   results  of  operations  or
liquidity.

Seasonality

         The Company's  domestic  operations have  historically  been seasonally
weaker in the first and fourth  quarters of the year and have produced  stronger
results in the  second  and third  quarters.  Sintel  has  experienced  seasonal
weakness in the first quarter, but has produced relatively strong results in the
fourth quarter.  This seasonality is primarily the result of customer  budgetary
constraints  and  preferences  and,  to a lesser  extent,  the  effect of winter
weather on outside plant activities.  Certain U.S.  customers,  particularly the
RBOCs, tend to complete budgeted capital expenditures before the end of the year
and defer additional  expenditures until the following budget year.  Telefonica,
the Company's  principal  international  customer,  has  historically  rushed to
complete budgeted  expenditures in the last quarter.  Revenue from MasTec Inepar
is not expected to fluctuate seasonally.

Impact of Inflation

         The primary  inflationary factor affecting the Company's  operations is
increased labor costs. The Company has not experienced  significant increases in
labor costs to date.  Competition  for qualified  personnel could increase labor
costs for the  Company  in the  future.  As a result,  of the  Company's  recent
increase in international activities, it may, at times in the future, operate in
countries that may experience high inflation.


                 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

         See index to Consolidated Financial Statements.


                9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS
                     ON ACCOUNTING AND FINANCIAL DISCLOSURE

         None.


             10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

         The information  concerning  directors and nominees for director of the
Company set forth under the caption  "Election of  Directors"  of the  Company's
Proxy  Statement  for the  1998  Annual  Meeting  of  Stockholders  (the  "Proxy



                                       17


Statement") is  incorporated  by reference into this Annual Report on Form 10-K.
Information  concerning the executive  officers of the Company is included under
the caption  "Executive  Officers of the  Registrant"  in reliance  upon General
Instruction G to Form 10-K and Instruction 3 of Item 40 l(b) of Regulation S-K.


                           11. EXECUTIVE COMPENSATION

         The information  concerning executive  compensation set forth under the
caption   "Executive   Compensation"   of  the  Company's   Proxy  Statement  is
incorporated by reference into this Annual Report on Form 10-K.


               12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
                                 AND MANAGEMENT

         The  information  concerning  security  ownership  set forth  under the
caption "Security  Ownership of Certain Beneficial Owners and Management" of the
Company's  Proxy  Statement is incorporated by reference into this Annual Report
on Form 10-K.


               13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         The information set forth under the caption "Certain  Relationships and
Related  Transactions"  of the  Company's  Proxy  Statement is  incorporated  by
reference into this Annual Report on Form 10-K.




                        14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K
  

                                                                             
                                              
                                                                                Page Number

             Report of Independent Accountants                                       F-1

             Report of Independent Accountants                                       F-2

(a)(i)       Consolidated Financial Statements

             Statements of Income for the three years ended
             December 31, 1997                                                       F-3

             Balance Sheets at December 31, 1996 and 1997                            F-5

             Statements of Stockholders' Equity for the
             three years ended December 31, 1997                                     F-6

             Statements of Cash Flows for the three
             years ended December 31, 1997                                           F-7

             Notes to Consolidated Financial Statements                              F-12

(b)          Report on Form 8-K


         On October 16, 1997,  the Company filed a Form 8-K current report dated
September  30,  1997  with the  Securities  and  Exchange  Commission  reporting
information  under  Item 5  thereof  regarding  the  sale of 5.5% of  Supercanal
Holding, S.A. See Note 2 of Notes to Consolidated Financial Statements.

         On October 16, 1997,  the Company filed a Form 8-K current report dated
October  6,  1997  with  the  Securities  and  Exchange   Commission   reporting
information  under  Item 5 thereof  regarding  the sale of its  indirect  equity
interest in Consorcio Ecuatoriano de Telecomunicaciones S.A. (Conecel).

         Index to Exhibits                                                           E-1



                                       18




                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Board of Directors and
Stockholders of MasTec, Inc.
Miami, Florida

We have audited the accompanying consolidated balance sheets of MasTec, Inc. and
subsidiaries  as of  December  31, 1997 and 1996,  and the related  consolidated
statements of income, stockholders' equity, and cash flows for each of the three
years in the period ended December 31, 1997. These financial  statements are the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these financial  statements based on our audits. We did not audit the
financial  statements  of Sistemas e  Instalaciones  de  Telecomunicacion,  S.A.
("Sintel"), a wholly owned subsidiary,  as of December 31, 1997 and for the year
then ended which statements reflect total assets and revenue  constituting 33.2%
and 29.5%,  respectively,  of the related  consolidated totals. Those statements
were audited by other  auditors  whose report has been  furnished to us, and our
opinion,  insofar  as it  relates to the  amounts  included  for Sintel is based
solely on the report of the other auditors.

We  conducted  our  audits  in  accordance  with  generally   accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We  believe  that our audits  and the  report of the other  auditors  provides a
reasonable basis for our opinion.

In our  opinion, based on our  audits and the  report of the other auditors, the
consolidated  financial  statements  referred to above  present  fairly,  in all
material  respects,  the  consolidated  financial  position of MasTec,  Inc. and
subsidiaries as of December 31, 1997 and 1996, and the  consolidated  results of
their  operations and their cash flows for each of the three years in the period
ended  December 31, 1997,  in  conformity  with  generally  accepted  accounting
principles.





COOPERS & LYBRAND L.L.P.
Miami, Florida
March 10, 1998




                                      F-1



                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Board of Directors and Stockholders of Sintel, S.A.


We have audited the consolidated  balance sheet of SINTEL, S.A. and subsidiaries
("Sintel") as of December 31,1997, the related consolidated statements of income
and  cash  flows  for the  year  then  ended,  and the  notes  to the  financial
statements, all expressed in Spanish pesetas. These financial statements are the
responsibility of  Sintel's  management.  Our  responsibility is  to express an
opinion on these financial statements based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards  require that we plan and perform the audit to obtain reasonable
assurance   about  whether  the  financial   statements  are  free  of  material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audit provides a reasonable basis for our opinion.

Note 18 of the notes to the consolidated  financial  statements details Sintel's
significant  transactions  with its main customer,  Telefonica de Espana,  S.A.,
performed under a contract in force for 1996-1998.

Certain  accounting  practices  of Sintel  used in  preparing  the  consolidated
financial  statements  of Sintel  conform  with  generally  accepted  accounting
principles in Spain,  but do not conform with  accounting  principles  generally
accepted  in the United  States.  A  description  of these  differences  and the
adjustments  required  to  conform  the  consolidated  financial  statements  to
accounting  principles  generally accepted in the United States are set forth in
Note 22.

In our opinion, the consolidated  financial statements referred to above present
fairly,  in all  materials  respects,  the  consolidated  financial  position of
SINTEL,  S.A. and subsidiaries as of December 31,1997,  and the results of their
operations  and  changes  in  financial  position  for the year then  ended,  in
conformity with generally accepted accounting principles in the United States as
set forth in Note 22.






ARTHUR ANDERSEN L.L.P.
Madrid, Spain
February 25, 1998




                                      F-2






                                  MASTEC, INC.
                        CONSOLIDATED STATEMENTS OF INCOME
                     (In thousands except per share amounts)

                                                                        For the Years Ended December 31, (3)
                                                                        ------------------------------------
                                                                                                  
                                                                       1995              1996             1997
                                                                       ----              ----             ----
Revenue                                                             $ 218,859         $ 534,068        $ 703,369
Costs of revenue                                                      158,598           394,497          522,470
Depreciation and amortization                                           8,178            13,686           24,127
General and administrative expenses                                    28,918            72,392           90,995
                                                                      -------           -------          -------
     Operating income                                                  23,165            53,493           65,777
Interest expense                                                        5,306            11,940           11,920
Interest and dividend income                                            3,501             3,480            1,921
Special charges-real estate and investment write-downs                 23,086                 0                0
Other income, net                                                       2,250             2,553            8,221
                                                                      -------           -------          -------
Income from continuing operations before equity in  
   (losses) earnings of unconsolidated companies, 
   (benefit) provision for income taxes and minority interest             524            47,586           63,999
Equity in (losses) earnings of unconsolidated companies                  (300)            3,040            2,897
(Benefit) provision for income taxes                                   (1,115)           14,665           21,015
Minority interest                                                         161                93           (3,346)
                                                                      -------           -------          -------
Income from continuing operations                                       1,500            36,054           42,535

Discontinued operations:
Income (loss) from discontinued operations,
  (net of applicable income taxes)                                         38              (177)             129
Net gain on disposal of discontinued operations net of
  a provision of $6,405 for 1995 to write down related
  assets to  realizable values and including operating 
  losses during phase-out period, net of applicable income taxes        2,493                66                0
                                                                      -------           -------          -------
Net income                                                          $   4,031         $  35,943        $  42,664
                                                                      =======           =======          =======

Pro forma data (1):
Income from continuing operations before equity in  
  (losses) earnings of unconsolidated companies, pro 
  forma provision for income taxes and minority interest            $     524         $  47,586        $  63,999
Equity in (losses) earnings of unconsolidated companies                  (300)            3,040            2,897
Pro forma provision for income taxes (1)                                  148            17,492           23,610
Minority interest                                                         161                93           (3,346)
Discontinued operations                                                 2,531              (111)             129
                                                                      -------           -------          -------
Pro forma net income                                                $   2,768         $  33,116        $  40,069
                                                                      =======           =======          =======

Basic earnings per share:
Weighted average common shares outstanding (2)                         25,263            26,074           27,294
Pro forma earnings per share (1) (2):
Continuing operations                                               $    0.01         $    1.27        $    1.46
Discontinued operations                                                  0.10              0.00             0.01
                                                                      -------           -------          -------
                                                                    $    0.11         $    1.27        $    1.47
                                                                      =======           =======          =======

Diluted earnings per share:
Weighted average common shares outstanding (2)                         25,440            26,499           27,853
Pro forma earnings per share (1) (2):
Continuing operations                                               $    0.01         $    1.25        $    1.43
Discontinued operations                                                  0.10              0.00             0.01
                                                                      -------           -------          -------
                                                                    $    0.11         $    1.25        $    1.44
                                                                      =======           =======          =======
<FN>

(1)      Provision for income taxes and net income have been adjusted to reflect
         a tax provision for companies which were previously S corporations.

                                      F-3


(2)      Amounts  have been  adjusted to reflect the  three-for-two  stock split
         effected on February 28, 1997 and shares issued in connection  with two
         acquisitions accounted for under the pooling of interest method.
(3)      The historical amounts have been restated to reflect the results of 
         operation of two 1997 acquisitions accounted for under the pooling of 
         interest method.
</FN>



The  accompanying  notes are an integral  part of these  consolidated  financial
statements.






                                      F-4






                                  MASTEC, INC.
                           CONSOLIDATED BALANCE SHEETS
                                 (In thousands)

                                                                                  December 31,
                                                                                  ------------
                                                                                          
                                                                          1996                 1997
                                                                          ----                 ----
ASSETS
Current assets:
   Cash and cash equivalents                                           $  10,989           $   6,063
   Accounts receivable-net and unbilled revenue                          318,967             346,596
   Notes receivable                                                       29,549                 682
   Inventories                                                             5,737               8,746
   Other current assets                                                   35,529              32,109
                                                                         -------             -------
         Total current assets                                            400,771             394,196
                                                                         -------             -------

Property and equipment-at cost                                            95,467             129,968
Accumulated depreciation                                                 (28,290)            (43,859)
                                                                         -------             -------
   Property and equipment-net                                             67,177              86,109
                                                                         -------             -------

Investments in unconsolidated companies                                   30,209              48,160
Other assets                                                              12,997              59,133
                                                                         -------             -------

         TOTAL ASSETS                                                  $ 511,154           $ 587,598
                                                                         =======             =======

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
   Current maturities of debt                                          $  39,916            $  54,562
   Accounts payable                                                      166,993              166,843
   Other current liabilities                                              28,651               49,043
                                                                         -------              -------
         Total current liabilities                                       235,560              270,448
                                                                         -------              -------

Other liabilities                                                         33,593               41,924
                                                                         -------              -------

Long-term debt                                                           125,018               94,495
                                                                         -------              -------

Commitments and contingencies

Stockholders' equity:
   Common stock                                                            2,780                2,805
   Capital surplus                                                       149,083               99,235
   Retained earnings                                                      49,070               86,921
   Accumulated translation adjustments                                      (802)              (3,466)
   Treasury stock                                                        (83,148)              (4,764)
                                                                         -------              -------
         Total stockholders' equity                                      116,983              180,731
                                                                         -------              -------

TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                             $ 511,154            $ 587,598
                                                                         =======              =======


The  accompanying  notes are an integral  part of these  consolidated  financial
statements.





                                      F-5





                                  MASTEC, INC.
                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                   For the three years ended December 31, 1997
                                 (In thousands)


                                                                                    
                                          Common Stock                          Accumulated
                                         Issued            Capital   Retained   Translation   Treasury
                                         Shares  Amount    Surplus   Earnings   Adjustments    Stock     Total
- ---------------------------------------------------------------------------------------------------------------
Balance December 31, 1994                27,806 $ 2,780   $134,094  $ 12,531    $       0    $(92,135) $ 57,270
Net income                                                             4,031                              4,031
Distributions by Pooled Companies                                       (926)                              (926)
Stock issued to 401(k)
Retirement savings plan from
   treasury shares                                              92                                146       238
Accumulated translation adjustment                                                      1                     1
- ---------------------------------------------------------------------------------------------------------------
Balance December 31, 1995                27,806   2,780    134,186    15,636            1     (91,989)   60,614
Net income                                                            35,943                             35,943
Distributions by Pooled Companies                                     (2,509)                            (2,509)
Cumulative effect of translation                                                     (803)                 (803)
Stock issued from treasury stock
   for options exercised                                        48                                523       571
Tax benefit for stock option plan                              513                                          513
Stock issued from treasury stock
   for an acquisition                                        8,844                              2,201    11,045
Stock issued for debentures
   from treasury stock                                       5,492                              6,117    11,609
- ---------------------------------------------------------------------------------------------------------------
Balance December 31, 1996                27,806   2,780    149,083    49,070         (802)    (83,148)  116,983
Net income                                                            42,664                             42,664
Distributions by Pooled Companies                                     (4,813)                            (4,813)
Cumulative effect of translation                                                   (2,664)               (2,664)
Stock issued from treasury stock
   for options exercised                                       206                                979     1,185
Tax benefit for stock option plan
   exercises                                                 1,538                                        1,538
Stock issued for acquisition                250      25      6,600                                        6,625
Stock issued from treasury stock
   for an acquisition                                        4,479                              1,603     6,082
Stock issued for stock dividend
   from treasury stock                                     (75,802)                            75,802         0
Treasury stock sold                                          3,007                                        3,007
Tax benefit for pooling treated as
   asset sales for income tax purposes                      10,124                                       10,124
- ---------------------------------------------------------------------------------------------------------------
Balance December 31,1997                 28,056 $ 2,805   $ 99,235   $86,921     $ (3,466)    $ 4,764  $180,731
- ---------------------------------------------------------------------------------------------------------------



The  accompanying  notes are an integral  part of these  consolidated  financial
statements.




                                      F-6





                                  MASTEC, INC.
                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                                 (In thousands)

                                                                          For the Years Ended December 31,
                                                                    -------------------------------------------
                                                                                                  
                                                                       1995             1996              1997
                                                                       ----             ----              ----

Cash flows from operating activities:
Net income                                                          $  4,031          $ 35,943         $ 42,664
Adjustments to reconcile net income to net cash
    provided by operating activities:
Minority interest                                                       (161)              (93)           3,346
Depreciation and amortization                                          8,178            13,686           24,127
Equity in losses (earnings) of
    unconsolidated companies                                             300            (3,040)          (2,897)
Special charges-real estate and
    investments write downs                                           23,086                 0                0
Gain on sale of assets                                                (2,823)             (365)          (6,848)
Changes  in  assets  and  liabilities   net  of 
  effect  of  acquisitions and divestitures:
  Accounts receivable-net and unbilled revenue                       (24,760)          (13,057)         (39,950)
  Inventories and other current assets                                (2,207)           (2,574)            (331)
  Other assets                                                        (2,617)           (4,657)          (7,994)
  Accounts payable                                                    10,807            26,460           12,188
  Income and deferred taxes                                           (8,338)            2,574           (4,276)
  Other current liabilities                                              451            (9,151)           8,208
  Net assets of discontinued operations                                  963             1,148             (394)
  Other liabilities                                                    1,032            (4,943)          (4,740)
                                                                     -------           -------          -------
Net cash provided by operating activities                              7,942            41,931           23,103
                                                                     -------           -------          -------

Cash flows from investing activities:
  Capital expenditures                                               (17,202)           (8,386)         (23,585)
  Cash acquired in acquisitions                                          148             1,130            2,106
  Cash paid for acquisitions                                          (1,750)           (6,164)         (48,910)
  Distributions from unconsolidated companies                            245             1,365            2,130
  Investments in unconsolidated companies                             (7,408)           (1,212)          (3,364)
  Investments in notes receivable                                    (25,000)                0                0
  Repayment of notes receivable                                          443             1,273              565
  Repayment of stockholders loans receivable                           1,800                 0              780
  Net proceeds from sale of assets and other non-core assets          24,269             9,404           29,628
                                                                     -------           -------          -------
Net cash used in investing activities                                (24,455)           (2,590)         (40,650)
                                                                     -------           -------          -------


The  accompanying  notes are an integral  part of these  consolidated  financial
statements.




                                      F-7





                                  MASTEC, INC.
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)
                                 (In thousands)

                                                                          For the Years Ended December 31,
                                                                   -------------------------------------------
                                                                                                 
                                                                       1995             1996             1997
                                                                       ----             ----             ----

Cash flows from financing activities:
  Proceeds from revolving credit facilities                        $   46,125        $  17,476       $  57,321
  Other borrowings                                                     10,200           28,888          19,936
  Repayment of notes payable to stockholders                           (2,500)               0               0
  Debt repayments                                                     (40,091)         (75,280)        (65,147)
  Distributions by Pooled Companies                                      (926)          (2,509)         (4,813)
  Proceeds from common stock issued
    from treasury                                                         238              792           6,264
  Financing costs                                                        (516)               0            (587)
                                                                      -------          -------         -------

Net cash provided by (used in) financing activities                    12,530          (30,633)         12,974
                                                                      -------          -------         -------

Net (decrease) increase in cash and cash equivalents                   (3,983)           8,708          (4,573)

Net effect of translation on cash                                           0             (803)           (353)

Cash and cash equivalents - beginning of period                         7,067             3,084         10,989
                                                                      -------           -------        -------

Cash and cash equivalents - end of period                            $  3,084         $  10,989      $   6,063
                                                                      =======           =======        =======

Supplemental  disclosures of cash flow information:  Cash paid during the period
for:

  Interest                                                           $  5,302         $  10,530      $   9,058
  Income taxes                                                       $  7,527         $  12,867      $  10,432





The  accompanying  notes are an integral  part of these  consolidated  financial
statements.





                                      F-8





                                  MASTEC, INC.
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)
                                 (In thousands)

Supplemental disclosure of non-cash investing and financing activities:

                                                                            For the Years Ended December 31,
                                                                     -------------------------------------------
                                                                                                  
                                                                        1995             1996             1997
                                                                        ----             ----             ----

Acquisitions accounted for under purchase method of accounting:
Fair value of assets acquired:
Accounts receivable                                                  $    167         $ 248,087         $ 20,482
Inventories                                                                 0             2,980              955
Other current assets                                                       67            12,661            1,618
Property and equipment                                                  2,688            13,148           19,257
Investments in unconsolidated companies                                     0             9,373                0
Real estate and other assets                                               50             6,385            3,820
                                                                      -------           -------          -------
Total non-cash assets                                                   2,972           292,634           46,132
                                                                      -------           -------          -------
Liabilities                                                                71           162,928           20,299
Long-term debt                                                             93            78,966            2,153
                                                                      -------           -------          -------
Total liabilities assumed                                                 164           241,894           22,452
                                                                      -------           -------          -------
Net non-cash assets acquired                                            2,808            50,740           23,680
Cash acquired                                                             148             1,130            2,106
                                                                      -------           -------          -------
Fair value of net assets acquired                                       2,956            51,870           25,786
Excess over fair value of assets acquired                                   0             4,956           44,905
                                                                      -------           -------          -------
Purchase price                                                      $   2,956         $  56,826        $  70,691
                                                                      =======           =======          =======

Notes payable issued in acquisitions                                $     800         $  36,561        $     130
Cash paid and common stock issued for acquisitions                      1,750            17,340           60,354
Contingent consideration                                                  406             2,250            9,907
Acquisition costs                                                           0               675              300
                                                                      -------           -------          -------
Purchase price                                                      $   2,956         $  56,826        $  70,691
                                                                      =======           =======          =======


Property acquired through financing arrangements                    $   9,452         $   8,550        $     413
                                                                      =======           =======          =======





The  accompanying  notes are an integral  part of these  consolidated  financial
statements.


                                      F-9



                                   MASTEC, INC
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)
                                 (In thousands)


Supplemental disclosure of non-cash investing and financing activities (cont.)

                                                              December 31,
                                                                  1995
                                                                  ----
Disposals:
Assets sold:
  Accounts receivable                                         $   2,158
  Inventories                                                     1,770
  Other current assets                                               22
  Property and equipment                                          1,832
  Other assets                                                        4
                                                                -------
Total non-cash assets                                             5,786
Liabilities                                                       1,878
Long-term debt                                                      343
                                                                -------
Total liabilities                                                 2,221
                                                                -------
Net non-cash assets sold                                      $   3,565
                                                                =======
Sale price                                                    $  12,350
Transaction costs                                                  (521)
Note receivable                                                    (450)
                                                                =======
Net cash proceeds                                             $  11,379
                                                                =======


The  accompanying  notes are an integral  part of these  consolidated  financial
statements.






                                      F-10



                                  MASTEC, INC.
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)
                   for the three years ended December 31, 1997


Supplemental disclosure of non-cash investing and financing activities:

         In 1995,  the Company's  purchase of a 33% interest in  Supercanal was 
financed in part by the seller for $7 million. (See Note 2.)

         During  1995,  MasTec  issued  $146,000 of common  stock from  treasury
stock for  purchases  made by The MasTec, Inc. 401 (k) Retirement Savings Plan. 
Capital surplus was increased by $92,000.

         In 1996,  the Company  issued  approximately  198,000  shares of common
stock for an  acquisition.  Common  stock was issued from  treasury at a cost of
$2.2 million.

         In 1996,  the Company  converted  $11.6 million of its 12%  convertible
subordinated debentures into common stock. Common stock was issued from treasury
at a cost of $6.1 million. (See Note 5.)

         In 1996,  the  Company's  purchase  of an  additional  3%  interest  in
Supercanal was financed in part by the sellers for $2 million. (See Note 2.)

         During 1996,  MasTec issued  $523,000 of common stock from treasury for
stock option exercises. Capital surplus was increased by $48,000.

         In 1997,  the Company  issued  approximately  173,000  shares of common
stock for domestic acquisitions.  Common stock was issued from treasury stock at
a cost of  approximately  $1.6  million.  (See Note 2 for non-cash  transactions
related to MasTec Inepar.)

         In July 1997,  the  Company  converted  a note  receivable  and accrued
interest thereon totaling $29 million into stock of Conecel. (See Note 2.)



The  accompanying  notes are an integral  part of these  consolidated  financial
statements.





                                      F-11




                    NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                        DECEMBER 31, 1997, 1996 AND 1995

1.        NATURE OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES

Nature of Business

         MasTec,  Inc. (the "Company" or "MasTec") is one of the world's 1eading
contractors  specializing  in the  build-out  of  telecommunications  and  other
utilities  infrastructure.  The  Company's  business  consists  of  the  design,
installation and maintenance of the outside physical plant ("outside plant") for
telephone   and  cable   television   communications   systems,   including  the
installation of aerial,  underground and buried copper,  coaxial and fiber optic
cable  networks  and  the   construction  of  wireless   antenna   networks  for
telecommunications   service   companies  such  as  local   exchange   carriers,
competitive  access  providers,   cable  television   operators,   long-distance
carriers, and wireless phone companies. The Company also installs central office
equipment and designs,  installs and maintains  integrated voice, data and video
local and wide area networks inside  buildings  ("inside  wiring").  The Company
believes it is the largest independent  contractor providing  telecommunications
infrastructure  construction  services in the United States and Spain and one of
the largest in  Argentina,  Chile,  Brazil and Peru.  The Company also  provides
infrastructure  construction  services to the electric  power industry and other
public utilities.

         The Company is able to provide a full range of infrastructure  services
to its telecommunications company customers.  Domestically, the Company provides
outside   plant   services  to  local   exchange   carriers  such  as  BellSouth
Telecommunications,  Inc.  ("BellSouth"),  U.S. West  Communications,  Inc., SBC
Communications,  Inc., United Telephone of Florida, Inc. (a subsidiary of Sprint
Corporation)  and GTE Corp.  At  December  31,  1997,  MasTec had 20  multi-year
service contracts  ("master  contracts") with regional bell operating  companies
("RBOCs")  and other local  exchange  carriers  to provide all of their  outside
plant  requirements  up to a specific  dollar amount per job and within  certain
geographic areas. Internationally, the Company provides through its wholly owned
subsidiary Sistemas e Instalaciones de Telecomunicacion, S.A. ("Sintel") outside
plant  services,  turn-key  switching  system  installation  and  inside  wiring
services to  Telefonica  de Espana,  S.A.  ("Telefonica")  under three  separate
multi-year  contracts similar to those in the U.S. which expire in 1998. In July
1997,  the Company also began  servicing  the local  telephone  subsidiaries  of
Telecomunicacoes    Brasileiras    S.A.,    the    Brazilian    government-owned
telecommunications system ("Telebras"), in Sao Paulo, Rio de Janeiro, Parana and
other states in the more populous and developed  Southern  region of Brazil,  as
well as Companhia  Riograndense de  Telecomunicacoes,  S.A.  ("CRT"),  the local
telephone company in Rio Grande do Sul which is partly owned by Telefonica.

         The Company was formed through the combination of Church & Tower,  Inc.
("Church and Tower") and Burnup & Sims Inc.  ("Burnup & Sims"),  two established
names in the U.S.  telecommunications  and other utilities construction services
industry.  On March 11, 1994, the shareholders of Church & Tower acquired 65% of
the  outstanding  common  stock of Burnup & Sims in a reverse  acquisition  (the
"Burnup Acquisition"). Following the change in control, the senior management of
Burnup & Sims was replaced by Church & Tower management and the name of Burnup &
Sims was changed to "MasTec,  Inc." Church & Tower is considered the predecessor
company to MasTec and,  accordingly,  the results of Burnup & Sims subsequent to
March 11, 1994 are included in the results of the Company.

         In July and August  1997,  Wilde  Construction,  Inc.  and two  related
companies  ("Wilde")  and AIDCO,  Inc.  ("Aidco")  and one related  company were
merged  with and into the  Company  through an  exchange  of common  stock.  The
mergers were accounted for as poolings of interest.  Accordingly,  the Company's
consolidated financial statements include the results of Wilde and Aidco for all
periods presented (see Note 2).

Management's Estimates

         The  preparation of financial  statements in conformity  with generally
accepted  accounting  principles  requires  management  to  make  estimates  and
assumptions  that  affect the  reported  amounts of assets and  liabilities  and
disclosure of  contingent  assets and  liabilities  at the date of the financial
statements  and the  reported  amounts  of  revenues  and  expenses  during  the
reporting period. Actual results could differ from those estimates.

Principles of Consolidation

         The  Consolidated   Financial  Statements  include  MasTec,  Inc.  and 
its  subsidiaries.   All  material intercompany  accounts and transactions have 
been eliminated. Certain prior year amounts have been reclassified to conform to
the current presentation.


                                      F-12



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                  DECEMBER 31, 1997, 1996 AND 1995 (continued)


Foreign Currency

         The  financial  position  and results of  operations  of the  Company's
foreign  subsidiaries  are  measured  using  local  currency  as the  functional
currency.  The Company  translates  foreign  currency  financial  statements  by
translating  balance  sheet  accounts at the exchange  rate on the balance sheet
date and income statement  accounts at the average exchange rate for the period.
Translation  gains  and  losses  are  recorded  in  stockholders'   equity,  and
transaction gains and losses are reflected in income.

Revenue Recognition

         Revenue and related costs for short-term  construction  projects (i.e.,
projects  with  duration of less than one month) are  recognized as the projects
are completed. Revenue generated by certain long-term construction contracts are
accounted  for by the  percentage-of-completion  method  under  which  income is
recognized  based on the ratio of  estimated  cost  incurred to total  estimated
contract cost.  Losses,  if any, on such contracts are provided for in full when
they  become  known.  Billings  in  excess of costs and  estimated  earnings  on
uncompleted contracts are classified as current liabilities. Any costs in excess
of billings are  classified  as current  assets (See Note 3). Work in process on
contracts  is  based  on work  performed  but not  billed  to  customers  as per
individual contract terms.

         The Company also  provides  management,  coordination,  consulting  and
administration  services  for  construction  projects.   Compensation  for  such
services is recognized ratably over the term of the service agreement.

Earnings Per Share

         In 1997, the Company adopted Statement of Financial Standards ("SFAS")
No. 128, "Earnings per Share" issued by the Financial Accounting Standards Board
"FASB" SFAS No. 128 requires the presentation of basic earnings per common share
and diluted earnings per common share.  Basic earnings per common share is 
computed by dividing income available to common stockholders by the weighted
average number of common shares outstanding.  Diluted earnings per common share
includes the diluting effect of stock options and warrants using the treasury
stock method.  The difference between the weighted average common shares 
outstanding used to calculate basic and diluted earnings relates to options
assumed exercised which were 177,000, 425,000 and 559,000 at December 31, 1995,
1996 and 1997, respectively.

Cash and Cash Equivalents

         The Company  considers all short-term  investments  with  maturities of
three months or less when purchased to be cash  equivalents.  The Company places
its temporary cash investments with high credit quality financial  institutions.
At times,  such investments may be in excess of the F.D.I.C.  insurance  limits.
The Company has not experienced any loss to date on these investments.

Inventories

         Inventories  (consisting  principally  of material  and  supplies)  are
carried at the lower of first-in, first-out cost or market.

Property and Equipment, Net

         Property  and  equipment  are  recorded  at  cost,   less   accumulated
depreciation.  Depreciation is provided using the straight-line  method over the
estimated useful life of the assets as follows:  buildings and improvements -- 5
to 20 years, and machinery and equipment -- 3 to 7 years. Leasehold improvements
are amortized over the shorter of the term of the lease or the estimated  useful
lives of the improvements.  Expenditures for repairs and maintenance are charged
to expense as incurred.  Expenditures for betterments and major improvements are
capitalized.  The  carrying  amounts  of  assets  sold or  retired  and  related
accumulated  depreciation  are  eliminated  in the  year  of  disposal  and  the
resulting gains and losses are included in income.

                                      F-13


Investments

         The Company's  investment in real estate located  primarily in Florida,
acquired in connection with the Burnup  Acquisition,  is stated at its estimated
net realizable value.  Investments in unconsolidated companies are accounted for
following  the equity  method of accounting  when  significant  influence by the
Company exists (see Note 2).

Accrued Insurance

         The Company is  self-insured  for certain  property  and  casualty  and
worker's compensation  exposure and,  accordingly,  accrues the estimated losses
not otherwise covered by insurance.

Income Taxes

         The Company records income taxes using the liability method. Under this
method,  the  Company  records  deferred  taxes based on  temporary  taxable and
deductible  differences  between  the tax  bases  of the  Company's  assets  and
liabilities  and their  financial  reporting  bases.  A valuation  allowance  is
established when it is more likely than not that some or all of the deferred tax
assets will not be realized.

Recent Accounting Pronouncements

         In June 1997,  the FASB  issued SFAS No. 130  "Reporting  Comprehensive
Income" which  establishes  standards for reporting and display of comprehensive
income and its components (revenues,  expenses,  gains and losses) in a full set
of  general-purpose  financial  statements.  This  statement  requires  that  an
enterprise  classify  items of other  comprehensive  income by their nature in a
financial  statement and display the accumulated  balance of other comprehensive
income separately from retained  earnings and additional  paid-in capital in the
equity section of a statement of financial position. This statement is effective
for fiscal years beginning after December 15, 1997. The Company  anticipates the
effects  of SFAS No.  130 will  result in the  disclosure  of  foreign  currency
translation adjustment as part of comprehensive income.

         In June 1997, the FASB issued SFAS No. 131  "Disclosure  about Segments
of an Enterprise and Related Information" which establishes standards for public
business  enterprises to report  information about operating  segments in annual
financial   statements  and  requires  those   enterprises  to  report  selected
information  about  operating  segments in interim  financial  reports issued to
shareholders.  It also establishes the standards for related  disclosures  about
products and services,  geographic  areas, and major  customers.  This statement
requires  a  public  business   enterprise   report  financial  and  descriptive
information about its reportable operating segments.  The financial  information
is  required  to be  reported  on the  basis  that  it is  used  internally  for
evaluating  segment  performance  and  deciding  how to  allocate  resources  to
segments.  Operating  segments  are  components  of an  enterprise  about  which
separate financial  information is available that is evaluated  regularly by the
chief  operating  decision  maker in deciding how to allocate  resources  and in
assessing performance.  This statement is effective for financial statements for
periods  beginning after December 15, 1997.  Management is currently  evaluating
the  requirements  of  SFAS  No.  131 to  determine  the  extent  of  additional
disclosure.


2.        ACQUISITIONS AND INVESTING ACTIVITIES

Domestic

         In July 1997, the Company  completed the  acquisition  of Wilde,  which
provides  telecommunications  and cable  television  infrastructure  services in
Minnesota, North and South Dakota, Iowa, Nebraska and other bordering states. In
August 1997, the Company  completed the  acquisition of Aidco, a company engaged
in the installation and maintenance of voice, data and video local-area networks
in the  Western and  Midwestern  states.  These  acquisitions  were  consummated
through  stock-for-stock  exchanges  in which the Company  issued  approximately
1,371,000  shares of common  stock.  The Company has accounted for these mergers
under  the  pooling  of  interest  method.  Accordingly,   historical  financial
information  has been restated to reflect the mergers as though they occurred as
of the earliest period presented.  These acquisitions are collectively  referred
to as the "Pooled Companies."

                                      F-14


         During 1996 and 1997, the Company completed certain other  acquisitions
which have been  accounted for under the purchase  method of accounting  and the
results of operations have been included in the Company's consolidated financial
statements from the respective  acquisition  dates. If the acquisitions had been
made at the beginning of 1996 or 1997, pro forma results of operations would not
have differed  materially  from actual results.  Acquisitions  made in 1997 were
Kennedy  Cable  Construction,   Inc.,  GJS  Construction  Co.  d/b/a  Somerville
Construction  and  Shanco  Corporation,  three  contractors  servicing  multiple
systems  operators  such as Time  Warner,  Inc.,  Marcus  Cable  Company and Cox
Communications,  Inc. in a number of states including Alabama, Arizona, Florida,
Georgia,  New Jersey,  New York,  North Carolina,  South Carolina and Texas; and
R.D.   Moody    Associates,    Inc.,   B&D   Contractors   of   Shelby,    Inc.,
Tele-Communications  Corporation of Virginia,  E.L. Dalton & Company, Inc., R.D.
Moody  Associates  of  Virginia,   Inc.  and  Weeks   Construction,   Inc.,  six
telecommunications  and utility  contractors  with  operations  primarily in the
southeastern  and  southwestern  United States.  Acquisitions  made in 1996 were
Carolina  ComTec,  Inc., a privately  held  company  engaged in  installing  and
maintaining voice, data and video networks,  and  Harrison-Wright  Company Inc.,
one of the oldest  telecommunications  contractors  in the  southeastern  United
States.

         Intangible  assets of  approximately  $23.6  million  resulting  from 
domestic business  acquisitions are included  in other  long-term  assets  and 
principally  consist  of the  excess acquisition  cost over the fair  value of 
the net  assets  acquired  (goodwill).  Goodwill  associated  with  domestic   
acquisitions  is  being  amortized  on  a  straight-line  basis  over a range of
15-20  years.   The  Company  periodically  reviews  goodwill  to  assess
recoverability.

         Separate  results of the Pooled  Companies for the periods prior to the
consummation of the  combinations,  including a pro forma  adjustment for income
taxes  related to the  Subchapter S status of certain  Pooled  Companies  are as
follows:



                                                                                                  
                                                                                        Pooled
                                                                      MasTec           Companies        Combined
                                                                     --------          ---------        --------

Year ended December 31, 1995
Total revenue                                                        $174,583          $ 44,276         $218,859
Pro forma net (loss) income                                          $   (609)         $  3,377         $  2,768
Year ended December 31, 1996
Total revenue                                                        $472,800          $ 61,268         $534,068
Pro forma net income                                                 $ 30,065          $  3,051         $ 33,116
Year ended December 31, 1997
Total revenue                                                        $659,439          $ 43,930         $703,369
Pro forma net income                                                 $ 35,398          $  4,671         $ 40,069


International

         On April 30, 1996, the Company  purchased from  Telefonica  100% of the
capital stock of Sintel, a company engaged in telecommunications  infrastructure
construction services in Spain, Argentina,  Chile, and Peru. In Argentina, Chile
and Peru, the Company currently operates through unconsolidated  corporations in
which it holds 50% interests.  The purchase price for Sintel was Spanish Pesetas
("Pesetas")  4.9  billion  (US$39.5  million  at the then  exchange  rate of 124
Pesetas to one U.S.  dollar).  An initial  payment of Pesetas 650 million  ($5.1
million) was made at closing.  An additional  Pesetas 650 million ($4.9 million)
was paid on December 31, 1996, with the balance of the purchase  price,  Pesetas
3.6 billion  (US$27.5  million),  due in two equal  installments on December 31,
1997 and 1998.  The  Company  has  paid  a  portion  of  the  December 31, 1997 
installment in connection with the acquisition debt, with the remaining  amount
to be paid pending resolution of the offsetting amounts between the Company and 
Telefonica.  Prior to April 30, 1996,  as part of the terms of the purchase and
sale agreement with Telefonica,  Sintel sold certain buildings to Telefonica and
Telefonica repaid certain tax credits and made a capital  contribution to Sintel
(collectively  referred to as the "Related  Transactions").  The total  proceeds
from the Related  Transactions were approximately  $41.0 million and resulted in
an increase in equity of $28.1  million  prior to the  purchase.  The assets and
liabilities  resulting from the  acquisition  are disclosed in the  supplemental
schedule of non-cash  investing  and financing  activities  in the  Consolidated
Statements of Cash Flows. The Sintel  acquisition gave the Company a significant
international presence. See Note 9 regarding geographic information.

         The following  information  presents the unaudited pro forma  condensed
results of operations  for the year ended  December 31, 1996 as if the Company's
acquisition  of Sintel and the Related  Transactions  had occurred on January 1,

                                      F-15


1996.  The Sintel  acquisition  has been treated as a "purchase"  as the term is
used under generally accepted accounting  principles.  Management's  estimate of
fair value  approximated  that of the carrying value of the net assets  acquired
after  reflecting  a reserve  for  involuntary  employee  terminations  of $12.4
million and deferred taxes of $4.3 million. The pro forma results, which include
adjustments  to  increase  interest  expense  resulting  from the debt  incurred
pursuant  to the  Sintel  acquisition  ($700,000),  offset by the  reduction  in
interest and depreciation  expenses resulting from the Related  Transactions ($1
million) and a tax benefit at 35% is presented for  informational  purposes only
and are not  necessarily  indicative  of the  future  results of  operations  or
financial  position  of the Company or the results of  operations  or  financial
position of the Company had the Sintel acquisition and the Related  Transactions
occurred January 1, 1996.

                                              Pro forma results of operations
                                           for the year ended December 31, 1996
                                                      (in thousands)

Revenue                                                 $ 617,763
Income from continuing operations                          36,423
Net income                                                 36,312
Basic earnings per share:
Continuing operations                                   $    1.40
Discontinued operations                                      0.00
                                                         --------
  Net income                                            $    1.40
                                                         ========
Diluted earnings per share:
Continuing operations                                   $    1.37
Discontinued operations                                       .00
                                                         --------
  Net income                                            $    1.37
                                                         ========


         The pro forma  results for the year ended  December 31,  1996,  include
special  charges  incurred  by Sintel  related to a  restructuring  plan of $1.4
million.

         On July 31,  1997,  the Company  completed  its  acquisition  of 51% of
MasTec Inepar S/A-Sistemas de Telecomunicacoes ("MasTec Inepar"), a newly formed
Brazilian  telecommunications  infrastructure  contractor,  for $29.4 million in
cash payable over eleven  months and 250,000  shares of common  stock.  Goodwill
related to  this  acquisition  at  December  31,  1997 is $16.5  million and is 
included in other long-term assets.  Goodwill is being amortized over 15 years.

Investing Activities

         In July 1996,  the Company  contributed  its 36% ownership  interest in
Supercanal, S.A. ("Supercanal"),  a cable television operator in Argentina, to a
holding  company which also held the other shares of Supercanal.  Concurrently, 
Multicanal,  S.A., one of the leading  cable television  operators in Argentina
acquired a 20% interest  in the  holding company for approximately  $17  million
in   cash  and  provided  significant  additional  financing  to  fund  pending 
acquisitions. As a result of the Multicanal investment, the shareholders entered
into an  agreement whereby  Multicanal  was  granted  veto  powers over certain 
fundamental  board and  stockholder  decisions and,  along with the  majority  
shareholder,  was  given  operational  control of  Supercanal.  The  Company's  
interest  in the  holding  company  was  reduced to approximately  28.8% by this
transaction  and the  Company no longer  exercised significant  influence in the
operations  of  Supercanal.   Accordingly,  its investment  is  accounted for at
cost  and  is  included  in  investments  in  unconsolidated companies.

         At December 31, 1997, the Company's  investment in Supercanal was $16.0
million. Based on the most recent available financial information,  for the nine
months ended  September 30, 1997,  Supercanal  incurred  losses of $19.5 million
(unaudited)   and   reflected  a   shareholders'   deficiency  of  $7.2  million
(unaudited).

         In July 1995, the Company made a $25 million  non-recourse term loan to
Devono Company Limited,  a British Virgin Islands  corporation  ("Devono").  The
loan was  collateralized  by 40% of the capital stock of a holding  company that
owned 52.6% of the capital stock of Consorcio Ecuatoriano de Telecomunicaciones,
S.A.  ("Conecel"),  one of two  cellular  phone  operators  in the  Republic  of
Ecuador.  In June 1997, the Company converted its loan and accrued interest into
the stock of the  holding  company.  In  December  1997,  the  Company  sold its
investment  in the  holding  company  for $20.0  million in cash and 7.5 million

                                      F-16



shares of Conecel Class B non-voting stock valued at $25.0 million. Accordingly,
the Company recognized a gain of $4.4 million net of tax based of the percent of
cash received to the total transaction value.


3.        ACCOUNTS RECEIVABLE-NET

         Accounts  receivable  are  presented  net of an allowance  for doubtful
accounts of $1.0 million,  $3.1 million,  and $3.1 million at December 31, 1995,
1996 and 1997,  respectively.  The  Company  recorded a provision  for  doubtful
accounts of $.4 million,  $1.2 million,  and $0.3 million during 1995,  1996 and
1997 respectively. In addition, the Company recorded write-offs of $0.7 million,
$0.1 million,  and $0.7 million during 1995, 1996 and 1997,  respectively and in
1996 and 1997  transferred  from other  accounts  $0.9 million and $0.4 million,
respectively.

         Accounts  receivable include retainage which has been billed but is not
due until completion of performance and acceptance by customers,  and claims for
additional work performed outside original contract terms.  Retainage aggregated
$4.1 million and $10.2 million at December 31, 1996 and 1997, respectively.

         Included in accounts  receivable  is unbilled  revenue of $42.4 million
and $97.5  million at December 31, 1996 and 1997,  respectively.  Such  unbilled
amounts represent work performed but not billable to customers as per individual
contract terms.


4.        PROPERTY AND EQUIPMENT

         Property and equipment is comprised of the following as of December 31,
1996 and 1997 (in thousands):



                                                                                  
                                                                       1996            1997
                                                                       ----            ----

Land                                                                $   7,583       $   8,430
Buildings and improvements                                              6,754           9,474
Machinery and equipment                                                77,254         106,254
Office furniture and equipment                                          3,876           5,810
                                                                     --------        --------
                                                                       95,467         129,968
Less-accumulated depreciation                                         (28,290)        (43,859)
                                                                     --------        --------
                                                                    $  67,177       $  86,109
                                                                     ========        ========



                                      F-17



5.        DEBT

         Debt is comprised of the following (in thousands):



                                                                                           At December 31,
                                                                                                    
                                                                                       1996              1997
                                                                                       ----              ----

Revolving Credit Facility, at LIBOR plus 1.00% (6.96%
  at December 31, 1997)                                                             $       0         $  83,010
Fleet Credit Facility at LIBOR plus 2.00%-2.25%
  and 7.75% -7.94% at December 31, 1996)                                               46,865                 0
Revolving Credit Facility, at MIBOR plus 0.30% (7.0% at
  December 31, 1996 and 5.60% at December 31, 1997
  due on November 1, 1998)                                                             43,613            10,894
Other bank facilities, denominated in Spanish pesetas,
  at interest rates from 8.1% to 9.3% at December 31, 1996
  and 5.65% - 6.75% at December 31, 1997                                               11,048            17,438
Notes payable for equipment, at interest rates from
  7.5% to 8.5% due in installments through the year 2000                               28,607            14,500
Notes payable for acquisitions, at interest rates from
  7% to 8% due in installments through February 2000                                   32,253            23,215
Real estate mortgage notes, at interest
  rates from 8.5% to 8.53%                                                              2,548                 0
                                                                                      -------           -------
Total debt                                                                            164,934           149,057
Less current maturities                                                               (39,916)          (54,562)
                                                                                      -------           -------

Long term debt                                                                      $ 125,018         $  94,495
                                                                                      =======           =======



         In June 1997, the Company  obtained a $125.0 million  revolving  credit
facility (the "Credit Facility"),  from a group of financial institutions led by
BankBoston,  N.A.  maturing on June 9, 2000 to replace the Fleet Credit Facility
and certain  other  domestic  debt.  As a result of the  prepayment of the Fleet
Credit  Facility,  deferred  financing  costs  and a  termination  fee  totaling
$690,000 were expensed  in the second  quarter of 1997.  The Credit Facility is 
secured  by  a  pledge  of  the  stock  of  the  Company's  principal  domestic 
subsidiaries and a portion of the stock of Sintel.

         Additionally,  the Company has several credit facilities denominated in
Pesetas, one of which is a revolving credit facility with a wholly-owned finance
subsidiary of  Telefonica.  Interest on this  facility  accrues at MIBOR (Madrid
interbank  offered rate) plus .30%.  At December 31, 1996 and 1997,  the Company
had $82.1  million  (11.3  billion  Pesetas)  and  $50.6  million  (7.7  billion
Pesetas),  respectively of debt denominated in Pesetas,  including $27.4 million
and $22.3 million,  respectively,  remaining under the acquisition debt incurred
pursuant to the Sintel  acquisition (see Note 2). The Company has paid a portion
of the December 31, 1997  installment in connection with the  acquisition  debt,
with the  remaining  amount  to be paid  pending  resolution  of the  offsetting
amounts between the Company and Telefonica.

         On January 30,  1998,  the Company  sold $200.0  million,  7.75% senior
subordinated  notes (the "Notes") due in 2008 with  interest due  semi-annually.
The net  proceeds  were  used to repay  amounts  outstanding  under  the  Credit
Facility and for other corporate purposes.

         The Credit Facility and Notes contain certain  covenants  which,  among
other things, restrict the payment of dividends,  limit the Company's ability to
incur additional  debt,  create liens,  dispose of assets,  merge or consolidate
with another entity or make other investments or acquisitions,  and provide that
the Company must maintain minimum amounts of stockholders'  equity and financial
ratio  coverages,  requiring,  among other things,  minimum ratios at the end of
each  fiscal  quarter of debt to  earnings,  earnings  to  interest  expense and
accounts  receivable to trade  payables.  

         In May  1996,  the  Company  called  its 12%  convertible  subordinated
debentures  (the  "Debentures")  effective June 30, 1996.  The  Debentures  were
converted  into common  stock  increasing  the number of shares  outstanding  by
690,456.

         At December 31, 1997 debt matures as follows:

                               1998                             $  54,562
                               1999                                11,485
                               2000                                83,010
                                                                 --------
                               Total                            $ 149,057
                                                                  =======


                                      F-18





6.        STOCK OPTION PLANS

         Shares  underlying stock options and exercise prices have been adjusted
to  reflect  the  three-for-two  stock  split  declared  in 1997 by the Board of
Directors.  The Company's only stock option plan currently in effect is the 1994
Stock Incentive Plan (the "1994 Plan"). However,  options which were outstanding
under the  Company's  1976 and 1978 stock option plans at the time of the Burnup
Acquisition  remain  outstanding in accordance  with the terms of the respective
plans.  Approximately  49,200  shares  have been  reserved  for and may still be
issued in  accordance  with the terms of such  plans.  Compensation  expense  of
$589,000 and $14,700 was recorded in 1996 and 1997, respectively, related to the
1976 plan.

         The 1994 Plan  authorizes  the grant of options or awards of restricted
stock up to 2,500,000  shares of the Company's  common  stock,  of which 500,000
shares may be awarded as restricted  stock. As of December 31, 1997,  options to
purchase  1,412,625 shares had been granted.  Options become  exercisable over a
five year period in equal  increments  of 20% per year  beginning the year after
the date of grant and must be exercised within ten years from the date of grant.
Options are issued with an exercise  price no less than the fair market value of
the common stock at the grant date.

         The Company also  adopted the 1994 Stock  Option Plan for  Non-Employee
Directors (the "Directors'  Plan").  The Directors' Plan authorized the grant of
options to purchase up to 600,000  shares of the  Company's  common stock to the
non-employee  members of the Company's  Board of Directors.  Options to purchase
112,500  shares have been granted to Board  members  through  1997.  The options
granted  become  exercisable  ratably  over a three year period from the date of
grant and may be exercised  for a period of up to ten years  beginning  the year
after the date of grant at an exercise  price equal to the fair market  value of
such shares on the date the option is granted.

         In addition,  during 1994 options to purchase  150,000 shares of common
stock at $3.83 per share were granted to a director  outside the Directors' Plan
in  lieu  of  the  Director's  Plan  and  annual  fees  paid  to  the  director.
Compensation  expense of $42,500 in connection  with the issuance of this option
is being recognized  annually over the five year vesting period. The options are
exercisable ratably over a five year period beginning the year after the date of
grant and may be exercised  for a period of up to ten years  beginning  the year
after the date of grant.

         During  1997,  options to purchase  209,000  shares of common  stock at
prices no less than the fair  market  value of the  common  stock at the date of
grant ranging from $21.09 to $40.67 were granted to individuals outside the 1994
Plan subject to varying vesting schedules.



                                      F-19




The following is a summary of all stock option transactions:


                                                                                         

                                                                                                  Weighted Avg.
                                                           Weighted Avg.        Exercise         Fair Value of
                                                 Shares   Exercise Price         Price          Options Granted
                                                 ------   --------------         -----          ---------------      

Outstanding December 31, 1994                    407,700     $ 4.62      $   0.10  -  $   5.29
Granted                                          303,000       8.48      $   6.83  -  $   8.92       $ 4.22
Exercised                                         (3,150)      5.29      $   0.10  -  $   5.29
Canceled                                         (30,750)      3.94      $   0.10  -  $   8.92
                                                --------

Outstanding December 31, 1995                    676,800     $ 6.33      $   0.10  -  $   8.92
Granted                                          306,000      17.05      $   7.42  -  $  28.58       $ 9.23
Exercised                                        (82,200)      6.38      $   0.10  -  $   8.92
Canceled                                          (2,700)      5.29      $   5.29  -  $   8.92
                                                --------

Outstanding December 31, 1996                    897,900       9.98      $    .10  -  $ 28.58
Granted                                          992,725      24.96      $  21.09  -  $ 48.19        $ 19.97
Exercised                                       (201,950)      5.58      $   0.10  -  $ 21.83
Canceled                                         (78,850)     23.62      $   5.29  -  $ 31.63
                                                --------

Outstanding December 31, 1997                  1,609,825      19.10      $   1.33  -   $ 48.18
                                               =========



The following table summarizes  information  about stock options  outstanding at
December 31, 1997:


                                                                                      
                                               Options Outstanding                      Options Exercisable
                                  --------------------------------------------       ---------------------------
                                     Number          Wtd. Avg.        Wtd. Avg.         Number         Wtd. Avg.
           Range of               Outstanding        Remaining        Exercise       Excercisable      Exercise
       Exercise Prices            at 12/31/97     Contractual Life      Price         at 12/31/97       Price
       ---------------            -----------     ----------------      -----         -----------       -----      

    $  1.33    -   $  8.16           251,250             6.9          $  5.73            43,650        $  5.63
    $  8.67    -   $  9.81           250,200             7.1          $  9.09            92,550        $  9.10
    $ 21.09    -   $ 26.50           839,400             9.7          $ 21.47            26,250        $ 21.52
    $ 28.19    -   $ 31.62           218,985             9.2          $ 31.55               750        $ 28.58
    $ 34.79    -   $ 48.19            49,990             9.3          $ 42.05                 -        $     -
                                     -------            ----            -----           -------         ------

    $  1.33    -   $ 48.19         1,609,825            8.79          $ 19.10           163,200        $ 10.26
                                   =========            ====            =====           =======         ======


         In 1996, the Company adopted the disclosure provisions of SFAS No. 123,
"Accounting for Stock-Based Compensation." Accordingly,  the Company is required
to disclose  pro forma net income and  earnings per share both for 1996 and 1997
as if compensation expense relative to the fair value of the options granted had
been  included in earnings.  The fair value of each option  grant was  estimated
using the BlackScholes  option-pricing model with the following assumptions used
for grants in 1996 and 1997, respectively: a five and six year expected life for
1996 and 1997,  respectively;  volatility factors of 51% and 82%,  respectively;
risk-free  interest  rates of 6.13%  and  5.5%,  respectively;  and no  dividend
payments.  Had compensation cost for the Company's options plans been determined
and  recorded in  accordance  with SFAS No. 123,  the  Company's  net income and
earnings per share would have been reduced to the pro forma amounts as follows:


                                      F-20





                                                                                   
                                                                       1996             1997
                                                                       ----             ----

Net income:
As reported, including pro forma tax adjustment                      $ 33,116         $ 40,069
Pro forma                                                            $ 32,262         $ 34,202

Basic earnings per share:
As reported, including pro forma tax adjustment                      $   1.27         $   1.47
Pro forma                                                            $   1.24         $   1.25

Diluted earnings per share:
As reported, including pro forma tax adjustment                      $   1.25         $   1.44
Pro forma                                                            $   1.22         $   1.23



         The 1996 and 1997 pro  forma  effect on net  income is not  necessarily
representative  of the  effect in  future  years  because  it does not take into
consideration  pro forma  compensation  expense  related to grants made prior to
1995 and does not reflect a tax benefit related to the  compensation  expense as
such benefit would be reflected directly in stockholders'  equity given that the
options are considered incentive stock options.


7.        INCOME TAXES



The  provision  (benefit)  for  income  taxes  consists  of  the  following  (in
thousands):

                                                                                                  
                                                                       1995              1996             1997
                                                                       ----              ----             ----
Current:
Federal                                                              $  5,541          $  9,896         $  9,606
Foreign                                                                                   5,347            6,505
State and local                                                          (284)            1,535            1,670
                                                                       ------           -------          -------
Total current                                                           5,257            16,778           17,781
                                                                       ------           -------          -------

Deferred:
Federal                                                                (5,879)           (1,895)           2,778
State and local                                                          (493)             (218)             456
                                                                      -------           -------           ------
Total deferred                                                         (6,372)           (2,113)           3,234
                                                                      -------           -------           ------

(Benefit) provision for income taxes                                    (1,115)           14,665           21,015
Discontinued operations                                                   135               (70)              80
                                                                      -------           -------           ------
Total                                                              $     (980)         $ 14,595         $ 21,095
                                                                      =======           =======           ======




                                      F-21




         The tax effects of  significant  items  comprising  the  Company's  net
deferred  tax  liability  as of  December  31,  1996 and 1997 are as follows (in
thousands):

                                                                                                     
                                                                                        1996              1997
                                                                                        ----              ----
Deferred tax assets:
Accrued self insurance                                                                $  3,050          $ 2,100
Operating loss and tax credit carry forward                                                525            1,565
Accrual for disposal of discontinued
  operations                                                                             1,147                0
Intangible assets                                                                                         9,471
All other                                                                                4,774            7,550
                                                                                        ------          -------
Total deferred tax assets                                                                9,496           20,686
                                                                                        ------          -------

Deferred tax liabilities:
Property and equipment                                                                   5,817            7,536
Asset revaluations                                                                       5,462            6,066
All other                                                                                1,718            3,871
                                                                                        ------          -------
Total deferred tax liabilities                                                          12,997           17,473
Valuation allowance                                                                        500            1,376
                                                                                       -------          -------
Net deferred tax (liabilities) assets                                                 $ (4,001)        $  1,837
                                                                                       =======          =======





         The net change in the  valuation  allowance for deferred tax assets was
an increase of $876,000.  Such change is attributed  to $1,304,000  related to a
net  operating  loss  which if not used will  expire  between  2006-2009,  and a
decrease of $428,000 related to the utilization of net operating losses.

         Deferred tax assets of  $2,096,000  and  $1,164,000  for 1996 and 1997,
respectively,   have  been  recorded  in  current  assets  in  the  accompanying
consolidated financial statements.

         A reconciliation  of U.S.  statutory  federal income tax expense on the
earnings from continuing operations is as follows:

                                                                                                     
                                                                         l995               1996             1997
                                                                         ----               ----             ----
U.S. statutory federal rate
   applied to pretax income                                               35%                35%              35%
State and local income taxes                                                0                 2                2
Effect of dividend exclusion                                              (49)                0                0
Effect of non-U.S. tax rates                                                0                (1)              (1)
Foreign loss producing no tax benefit                                      62                 0                0
Adjustment of prior years' taxes                                          (46)                0                0
Change in federal statutory tax rate                                       82                 0                0
Change in state tax filing status                                         (77)                0                0
Income from S corporations accounted
   for as poolings                                                       (240)               (5)              (4)
Other                                                                      20                 0                1
                                                                          ---               ---              ---
(Benefit) provision for income taxes                                     (213)%              31%              33%
                                                                         ====               ===              ===



         No  provision  was made in 1996 and 1997 for U.S.  income  taxes on the
undistributed  earnings  of the  foreign  subsidiaries  as it is  the  Company's
intention to utilize those earnings in the foreign  operations for an indefinite
period of time.  At December  31,  1997,  undistributed  earnings of the foreign
subsidiaries  amounted  to  $26.2  million.  If the  earnings  of  such  foreign
subsidiaries were not indefinitely  reinvested, a deferred tax liability of $2.3
million would have been required.

         The Internal  Revenue  Service (the "IRS") has examined the tax returns
of Burnup & Sims for the fiscal  years ended April 30,  1989  through  April 30,
1993.  The  Company  has filed a  protest  with the  appellate  level of the IRS
regarding assessments made for the years 1989 through 1991. Adjustments, if any,
as a  result  of this  audit  will be  recorded  as an  adjustment  to  purchase
accounting.

                                       F-22



8.        CAPITAL STOCK

         The Company  has  authorized  100,000,000  shares of common  stock.  At
December 31, 1996 and 1997,  approximately  27,806,000 and 28,056,000  shares of
common stock were issued,  26,992,000  and  27,580,000  shares were  outstanding
(adjusted  for  the  stock  split  and  pooling   transactions)  (see  Note  2),
respectively,  and  814,000 and 476,000  were held in  treasury,  at cost (after
giving  effect to the stock split paid in the form of a dividend  from  treasury
stock),  respectively.  At December 31, 1996 and 1997, the Company had 5,000,000
shares of authorized but unissued preferred stock.

                                     
9.       OPERATIONS BY GEOGRAPHIC AREAS

         The   Company's   principal   source  of  revenue   is   derived   from
telecommunications  infrastructure  construction  services in the United States,
Spain and Brazil. The Company did not have significant  international operations
in 1995 accordingly, geographic information for 1996 and subsequent is presented
below:



                                                                               For the Year Ended December 31,
                                                                               ------------------------------
                                                                                                 
                                                                                    1996              1997
                                                                                    ----              ----
Revenue
  Domestic                                                                       $ 345,913         $ 420,976
  International                                                                    188,155           282,393
                                                                                   -------           -------
Total                                                                            $ 534,068         $ 703,369
                                                                                   =======           =======

Operating income
  Domestic                                                                       $  33,760         $  44,327
  International                                                                     19,733            21,450
                                                                                   -------           -------
Total                                                                            $  53,493         $  65,777
                                                                                   =======           =======



Identifiable assets
  Domestic                                                                       $ 147,065         $ 206,200
  International                                                                    258,071           258,105
  Corporate                                                                        106,018           123,293
                                                                                   -------           -------
Total                                                                            $ 511,154         $ 587,598
                                                                                   =======           =======



         There are no  transfers  between  geographic  areas.  Operating  income
consists of revenue  less  operating  expenses,  and does not  include  interest
expense,  interest  and other  income,  equity  in  earnings  of  unconsolidated
companies,  minority interest and income taxes. Domestic operating income is net
of  corporate  general  and  administrative  expenses.  Identifiable  assets  of
geographic areas are those assets used in the Company's operations in each area.
Corporate   assets   include   cash  and  cash   equivalents,   investments   in
unconsolidated  companies,  net assets of discontinued  operations,  real estate
held for sale and notes receivable.


10.      SIGNIFICANT CUSTOMERS AND CONCENTRATION OF CREDIT RISK

         The Company derives a substantial portion of its revenue from providing
telecommunications   infrastructure   services  to  Telefonica,   BellSouth  and
Telebras.  For the year ended December 31, 1995, the Company  derived 33% of its
revenue from services  performed for BellSouth.  For the year ended December 31,
1996,  approximately  31% and 13% of the  Company's  revenue  was  derived  from
services  performed for  Telefonica and  BellSouth,  respectively.  For the year
ended December 31, 1997, approximately 26%, 12% and 11% of the Company's revenue
was derived from  services  performed  for  Telefonica,  BellSouth and Telebras,
respectively.  Revenue generated by MasTec Inepar from Telebras is included from
August 1, 1997 (See Note 2). Accounts  receivable from the Company's two largest
customers  at December 31, 1996 and three  largest for 1997 were $194.2  million
and  $192.0  million,  respectively.   Although  the  Company's  strategic  plan
envisions  diversification of its customer base, the Company anticipates that it
will continue to derive a significant  portion of its revenue in the future from
Telefonica and its affiliates, BellSouth and Telebras.


                                       F-23


11.      COMMITMENTS AND CONTINGENCIES

         In December 1990, Albert H. Kahn, a stockholder of the Company, filed a
purported  class action and derivative  suit in Delaware state court against the
Company,  the  then-members  of its Board of  Directors,  and National  Beverage
Corporation  ("NBC"),  the  Company's  then-largest  stockholder.  The complaint
alleges,  among other  things,  that the  Company's  Board of Directors  and NBC
breached their respective fiduciary duties in approving certain transactions.

          In  November  1993,  Mr.  Kahn  filed a  class  action  and derivative
complaint against the Company,  the then members of its Board of Directors,  and
Jorge L. Mas, Jorge Mas and Juan Carlos Mas, the principal  shareholders  of the
Company. The 1993 lawsuit alleges,  among other things, that the Company's Board
of Directors and NBC breached their respective fiduciary duties by approving the
terms of the  acquisition  of the  Company by the Mas  family,  and that the Mas
family had knowledge of the fiduciary duties owed by NBC and the Company's Board
of Directors and knowingly and substantially participated in the breach of these
duties.  The lawsuit also claims  derivatively that each member of the Company's
Board of  Directors  engaged in  mismanagement,  waste and  breach of  fiduciary
duties in managing the  Company's  affairs prior to the  acquisition  by the Mas
Family.

         There has been no activity  in either of these  lawsuits in more than a
year.  The Company  believes  that the  allegations  in each of the lawsuits are
without merit and intends to defend these lawsuits vigorously.

         In August 1997, the Company settled its lawsuit with BellSouth  arising
from certain work performed by a subcontractor  of the Company from 1991 to 1993
for nominal consideration.

         In November  1997,  Church & Tower filed a lawsuit  against  Miami-Dade
County (the  "County") in Florida  state court  alleging  breach of contract and
seeking damages  exceeding $3.0 million in connection with the County's  refusal
to pay  amounts due to Church & Tower under a  multi-year  agreement  to perform
road restoration work for the Miami-Dade Water and Sewer Department  ("MWSD"), a
department  of  the  County,  and  the  County's  wrongful  termination  of  the
agreement. The County has refused to pay amounts due to Church & Tower under the
agreement until alleged overpayments under the agreement have been resolved, and
has counterclaimed against the Company seeking damages that the Company believes
will not exceed  $2.1  million.  The County also has refused to award a new road
restoration  agreement for MWSD to Church & Tower,  which was the low bidder for
the new agreement. The Company believes that any amounts due to the County under
the existing  agreement are not material and may be  recoverable  in whole or in
part from Church & Tower  subcontractors  who  actually  performed  the work and
whose bills were submitted directly to the County.

         The Company is a party to other  pending legal  proceedings  arising in
the normal course of business, none of which the Company believes is material to
the Company's financial position or results of operations.

         In 1990, Trilogy Communications,  Inc. filed suit against Excom Realty,
Inc., a wholly owned  subsidiary  of the  Company,  for damages and  declaratory
relief.  The  Company  counterclaimed  for  damages. On May 1, 1995, the Company
settled its counterclaim for $1.3 million,  which is recorded as other income in
the accompanying consolidated financial statements.

         In connection  with certain  contracts,  the Company has signed certain
agreements of indemnity in the aggregate amount of approximately  $87.5 million,
of which  approximately  $37.3  million  relate to the  uncompleted  portion  of
contracts  in  process.  These  agreements  are to  secure  the  fulfillment  of
obligations and performance of the related contracts.

         Federal,  state and local laws and  regulations  govern  the  Company's
operation of underground  fuel storage  tanks.  The Company is in the process of
removing,  restoring and upgrading these tanks, as required by applicable  laws,
and has  identified  certain  tanks and  surrounding  soil  which  will  require
remedial cleanups.


                                       F-24



12.      FAIR VALUE

         For certain of the Company's financial instruments,  including cash and
cash  equivalents,  accounts and notes  receivable,  accounts  payable and other
liabilities,  the  carrying  amounts  approximate  fair value due to their short
maturities.  Long-term floating rate debt is carried at amounts that approximate
fair  value.  The  Company  uses  letters  of credit to back  certain  insurance
policies.  The  letters of credit  reflect  fair value as a  condition  of their
underlying  purpose  and are  subject to fees  competitively  determined  in the
market place.

         The estimated fair values may not be representative of actual values of
the financial  instruments  that could have been realized as of year end or that
will be realized in the future.

                                 
13.      DISCONTINUED OPERATIONS AND REAL ESTATE HELD FOR SALE

         In the third quarter of 1995, the Company determined to concentrate its
resources and better position itself to achieve its strategic growth  objectives
by disposing of all of the general products segment that the Company acquired as
part  of  the  Burnup   Acquisition.   These   operations  and  assets  included
Southeastern  Printing Company,  Inc.  ("Southeastern"),  Lectro Products,  Inc.
("Lectro")  and Floyd  Theatres,  Inc.  ("Floyd  Theatres").  As a result of the
decision to accelerate  disposal of these assets, the Company recorded a special
charge in the third  quarter of 1996 of $15.4  million  to adjust  the  carrying
values of its real estate  investment to estimated net realizable value based on
offers received by the Company to dispose of certain real estate  investments in
a bulk transaction.  The original value assigned to the real estate  investments
contemplated  the  disposition of the  properties on an individual  basis and no
considerations  had previously  been given to a bulk sale. In the fourth quarter
of 1995,  the Company  recorded an additional  charge of $7.7 million to reflect
the  value  realized  upon a sale of  certain  real  estate  and  the  Company's
preferred stock  investment in early 1996.  These assets were sold at prices and
in a manner designed to facilitate their immediate  disposal so that the Company
could  concentrate  its  resources  on its  core  telecommunications  and  other
utilities construction business.

         In March 1995,  the  Company  sold the indoor  theater  assets of Floyd
Theatres for approximately  $11.5 million.  A gain of $1.5 million,  net of tax,
resulted from this transaction in the first quarter of 1995. In August 1995, the
Company sold the stock of Lectro for $11.9 million in cash and a note receivable
of  $450,000.  A gain of $5.9  million,  net of tax,  was  recorded in the third
quarter  of 1995  related to the sale of Lectro.  A loss of  approximately  $6.4
million,  net  of  tax,  relating  to  the  disposition  of  these  discontinued
operations  was recorded in the fourth  quarter of 1995.  In January  1997,  the
Company sold the assets of Southeastern at its carrying value for  approximately
$2.1 million in cash and a note for $500,000.

         As part of the acquisition of Harrison-Wright  Company,  Inc. (see Note
2), the  Company  purchased  the assets of Utility  Pre-cast,  Inc.  The Company
intends to sell the pre-cast  business and  accordingly  has  reflected  the net
assets of approximately $4.2 million as a discontinued operation.

         Included in other current assets in the  accompanying  balance sheet is
approximately  $15.7  million and $10.9  million of real estate held for sale at
December 31, 1996 and 1997, respectively.

         Discontinued  operations  include  management's  best  estimates of the
amounts expected to be realized on the sale of these assets. While the estimates
are based on current  negotiations,  the  amounts the  Company  will  ultimately
realize  could differ  materially  in the near term from the amounts  assumed in
arriving at the loss on disposal of the discontinued operations.

         Summary  operating  results of discontinued  operations,  excluding net
gains on disposal and estimated loss during the phase-out period, are as follows
(in thousands):



                                                                                                  
                                                                       1995             1996              1997
                                                                       ----             ----              ----

Revenue                                                              $ 21,952         $ 12,665          $ 4,471
                                                                       ======           ======           ======

Earnings (loss) before income taxes                                  $     58         $   (288)         $   209
Provision (benefit) for income taxes                                       20             (111)              80
                                                                       ------           ------           ------
Net income (loss) from discontinued operations                       $     38         $   (177)         $   129
                                                                       ======           ======           ======






                                      F-25



14.       QUARTERLY FINANCIAL DATA (Unaudited)

                                                      (Dollars in thousands, except earnings per share)
                                                                                         
                                                   First      Second         Third        Fourth
                                                  Quarter    Quarter (2)    Quarter (3)  Quarter (4)      Total
                                                  -------    ----------     ----------   ----------       -----
1996:

Revenue                                          $  70,670   $ 122,964      $ 162,208    $ 178,226    $ 534,068
                                                   =======     =======        =======      =======      =======

Operating income                                 $   5,954   $  10,194      $  17,131    $  20,214    $  53,493
                                                   =======     =======        =======      =======      =======
Income from continuing operations,
  as reported                                    $   3,696   $   5,689      $  11,586    $  15,083    $  36,054
                                                   =======     =======        =======      =======      =======
Pro forma income from
  continuing operations (6)                      $   3,371   $   5,645      $  10,752    $  13,459    $  33,227
  (Loss) income from
    discontinued operations including gain
    (loss) on disposal, net of taxes                   (14)         27            163         (287)        (111)
                                                   -------     -------        -------      -------      -------

Pro forma net income                             $   3,357   $   5,672      $  10,915    $  13,172    $  33,116
                                                   =======     =======        =======      =======      =======

Pro forma basic earnings per share (1) (5):
  Continuing operations                          $    0.13   $    0.22      $    0.41    $    0.50    $    1.27
  Discontinued operations                             0.00        0.00           0.01        (0.01)        0.00
                                                   -------     -------        -------      -------      -------
                                                 $    0.13   $    0.22      $    0.42    $    0.49    $    1.27
                                                   =======     =======        =======      =======      =======

Diluted earnings per share (1) (5):
 Continuing operations                           $    0.13   $    0.22      $    0.40    $    0.49    $    1.25
 Discontinued operations                              0.00        0.00           0.01        (0.01)        0.00
                                                   -------     -------        -------      -------      -------
                                                 $    0.13   $    0.22      $    0.41    $    0.48    $    1.25
                                                   =======     =======        =======      =======      =======

1997:

Revenue                                          $ 138,290   $ 160,726      $ 201,117    $ 203,236    $ 703,369
                                                   =======     =======        =======      =======      =======

Operating income                                 $  15,704   $  19,818      $  22,319    $   7,936    $  65,777
                                                   =======     =======        =======      =======      =======

Income from continuing operations,
  as reported                                    $   9,571   $  12,816      $  13,832    $   6,316    $  42,535
                                                   =======     =======        =======      =======      =======

Pro forma income from
  continuing operations (6)                      $   9,478   $  12,001      $  12,145    $   6,316    $  39,940
  (Loss) income from
    discontinued operations
    including gain (loss)
    on disposal, net of taxes)                         (51)        123             46           11          129
                                                  --------     -------        -------      -------      -------

Pro forma net income                             $   9,427    $ 12,124      $  12,191    $   6,327    $  40,069
                                                  ========     =======        =======      =======      =======

Pro forma:
Basic earnings per share (1) (5):
  Continuing operations                          $    0.35    $   0.44      $    0.44    $    0.23    $    1.46
  Discontinued operations                             0.00        0.00           0.00         0.00         0.01
                                                  --------     -------        -------      -------      -------
                                                 $    0.35    $   0.44      $    0.44    $    0.23    $    1.47
                                                  ========     =======        =======      =======      =======

Diluted earnings per share (1) (5):
  Continuing operations                          $    0.35    $   0.43      $    0.43    $    0.23    $    1.43
  Discontinued operations                             0.00        0.00           0.00         0.00         0.01
                                                  --------     --------       -------      -------     --------
                                                 $    0.35    $   0.43      $    0.43    $    0.23    $    1.44
                                                  ========     =======        =======      =======     ========
                                    
                                      F-26



<FN>

(1)      Earnings  per  share   amounts  have  been   adjusted  to  reflect  the
         three-for-two  stock split  declared  effected on February 28, 1997 and
         shares issued in connection with two  acquisitions  accounted for under
         the pooling of interest method.
(2)      The Company acquired Sintel (see Note 2) on April 30, 1996.
(3)      In the third  quarter of 1997,  the Company  commenced  operations in
         Brazil (see Note 2). (4) In the fourth  quarter of 1997, the Company 
         sold, at a gain of $4.4 million net of tax, a portion of its investment
         in Conecel. See Note 2.
(5)      Earnings per share are computed  independently for each of the quarters
         presented.  Therefore, the sum of the quarterly per share data does not
         equal the total  computed  for the year due to changes in the  weighted
         average number of common shares outstanding.
(6)      Amounts  and  earnings  per share have been  adjusted  to reflect a pro
         forma  tax  provision  for two  acquisitions  accounted  for  under the
         pooling of interest method which were previously S corporations.


</FN>



                                      F-27



                                  SIGNATURES

Pursuant to the  requirements  of Section 13 or 15(d) of the Securities Exchange
 Act of 1934,  the  Registrant  has duly caused this report to be signed on its 
behalf by the undersigned, thereunto duly authorized, on March 31, 1998.

                                    MasTec, Inc.
                                    (Registrant)

 


                                    ------------------------------------
                                    Edwin D. Johnson
                                    Senior Vice President -
                                      Chief Financial Officer
                                    (Principal Financial and Accounting Officer)

The undersigned  directors and officers of MasTec,  Inc. hereby constitute and 
appoint Edwin D. Johnson and Jose M. Sariego and each of them  with  full  power
to act without the other and with full power of substitution and resubstitution,
our true and  lawful attorneys-in-fact  with full power to execute in our name 
and behalf in the capacities  indicated below this  Annual Report on Form 10-K
and any and all amendments thereto and to  file the same,  with all  exhibits 
thereto and other documents in connection  therewith,  with the  Securities and
Exchange   Commission  and  hereby  ratify   and confirm   all  that   such  
attorneys-in-fact,  or any of them,  or their substitutes shall lawfully do or 
cause to be done by virtue hereof.

Pursuant to the  requirements  of the Securities  Exchange Act of 1934, this 
report has been signed below by the following  persons on behalf of the 
Registrant and in the capacities indicated on March 31, 1998.



_______________________________                      ___________________________
Jorge Mas                                            Joel-Tomas Citron
Chairman of the Board, President and                 Director
Chief Executive Officer
(Principal Executive Officer)




_______________________________
Jose S. Sorzano
Director




_______________________________
Arthur B. Laffer
Director



_______________________________
Eliot C. Abbott
Director


                                      S-1





EXHIBIT INDEX


3.1       Certificate of Incorporation and By-laws of the Company, filed as 
          Exhibit 3(i) to Company's Registration Statement on Form S-8 (File 
          No. 33-55237) and incorporated by reference herein.

3.2       Certificate of Amendment to Certificate of Incorporation of the
          Company.

4.1       7 3/4% Senior Subordinated notes Due 2008 Indenture dated as of 
          February 4, 1998, filed as Exhibit 4.2 to the Company's  Registration
          Statement on Form S-4 (file No. 333-46361) and incorporated by 
          reference herein.

10.1      Stock Option Agreement dated March 11, 1994 between the Company and 
          Arthur B. Laffer as filed as Exhibit 10.6 to the Company's Form 10-K 
          for the year ended December 31, 1995 and incorporated by reference 
          herein.

10.2      Stock Option Agreement dated December 29, 1997 between the Company and
          Henry N. Adorno.

10.3      Stock  Option Agreement dated  December 29, 1997 between the Company 
          and Joel-Tomas Citron.

10.4      Revolving Credit Agreement dated as of June 9, 1997 between the 
          Company, certain of its subsidiaries, and Bank Boston, N.A. as agent.

10.5      Agreement dated July 21, 1997 between the Company and Inepar S/A  
          Industrias e Construcoes.

21.1      Subsidiaries of the Company.

23.1      Consent of Arthur Andersen L.L.P.

23.2      Consent of Arthur Andersen L.L.P.

23.3      Consent of Arthur Andersen L.L.P.

23.4      Consent of Arthur Andersen L.L.P.

23.5      Consent of Arthur Andersen L.L.P.

23.6      Consent of Arthur Andersen L.L.P.

23.7      Consent of Arthur Andersen L.L.P.

23.8      Consent of Arthur Andersen L.L.P.

23.9      Consent of Arthur Andersen L.L.P.

23.10     Consent of Coopers & Lybrand L.L.P.

23.11     Consent of Coopers & Lybrand L.L.P.

23.12     Consent of Coopers & Lybrand L.L.P.

23.13     Consent of Coopers & Lybrand L.L.P.

23.14     Consent of Coopers & Lybrand L.L.P.

23.15     Consent of Coopers & Lybrand L.L.P.

23.16     Consent of Coopers & Lybrand L.L.P.

23.17     Consent of Coopers & Lybrand L.L.P.

23.18     Consent of Coopers & Lybrand L.L.P.

27.1      Financial Data Schedule - 1997

27.2      Financial Data Schedule - 1996

27.3      Financial Data Schedule - 1995