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, 1998

                          Commission File Number 0-3797



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

         Florida                                       65-0829355
(State or other jurisdiction                (I.R.S. Employer Identification No.)
of incorporation or organization)

3155 N.W. 77th Avenue, Miami, FL 33122-1205              (305) 599-1800
(Address of principal executive offices)          Registrant's telephone number,
                                                       including area code

           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

     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 26, 1999 was
27,341,385.   The   aggregate   market   value  of  the  voting  stock  held  by
non-affiliates  of the  registrant  based on the $22 5/8  closing  price for the
registrant's  Common Stock on the New York Stock  Exchange on March 26, 1999 was
approximately  $304,703,626.  Directors,  executive  officers and 10% or greater
shareholders  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 relating to the 1999 Annual Meeting
of Shareholders to be held on May 25, 1999, are incorporated by reference.



     The following  statement is made pursuant to the safe harbor provisions for
forward-looking statements described in the Private Securities Litigation Reform
Act of 1995. MasTec, Inc. and subsidiaries  ("MasTec" or the "Company") may make
certain statements in this Annual Report on Form 10-K that are  forward-looking,
such as statements  regarding MasTec's future growth and  profitability,  growth
strategy and anticipated  trends in the industries and economies in which MasTec
operates.  These  forward-looking  statements  are  based  on  MasTec's  current
expectations and are subject to a number of risks, uncertainties and assumptions
relating to MasTec's operations,  financial condition and results of operations,
competitive factors, shifts in market demand, and other risks and uncertainties,
including  risks  and  uncertainties  relating  to  MasTec's  dependence  on key
customers and the telecommunications industry, MasTec's growth strategy, foreign
operations,  restrictions  imposed by MasTec's credit agreements,  the impact of
competition,  MasTec's  dependence on the labor supply and on senior management,
the  ability of MasTec to  dispose of  non-core  assets and  seasonality,  among
others.  Should  one or more of these  risks or  uncertainties  materialize,  or
should the underlying  assumptions  prove  incorrect,  actual results may differ
significantly   from  results  expressed  or  implied  in  any   forward-looking
statements  made by MasTec.  These and other  risks are  detailed in this Annual
Report on Form 10-K and in other  documents  filed by MasTec with the Securities
and Exchange  Commission.  MasTec does not  undertake  any  obligation to revise
these forward-looking statements to reflect future events or circumstances.

                                    BUSINESS

General

     MasTec is one of the  preeminent  builders of internal and external  voice,
video, data, internet and other computer and communications networks for leading
telecommunications  service providers,  cable television operators,  Fortune 500
corporations  and power  companies.  MasTec  designs,  installs,  constructs and
maintains aerial,  underground and buried copper,  coaxial and fiber optic cable
networks as well as wireless antenna  networks  ("external  network  services").
Clients for  MasTec's  external  network  services  include  major  domestic and
international  telecommunication  service  providers,  incumbent and competitive
local exchange carriers, cable television operators,  long-distance carriers and
wireless phone companies.  MasTec also provides external network services to the
electric power  industry  ("power") that are similar to the services it provides
to  telecommunications  customers.  Additionally,  MasTec designs,  installs and
maintains   integrated  local  and  wide  area  networks  and  provides  systems
integration  and other value added services  ("internal  network  services") for
corporate customers and other organizations with multiple locations.

     MasTec was formed in March 1994 through the  combination  of two  companies
providing services to the  telecommunications  and other utility  infrastructure
construction industry since 1969 and 1929. MasTec has grown significantly in the
past five years  expanding its customer base and its geographic  presence across
the United States and Latin America.  Since March 1994,  MasTec has completed 31
domestic and seven foreign acquisitions.  Currently, MasTec is consolidating its
existing  domestic   acquisitions  and  emphasizing  domestic  internal  growth,
although it intends to continue to grow through  selected  acquisitions  to take
advantage of consolidation  opportunities  in the fragmented  telecommunications
and other  utilities  construction  industry  in the  United  States.  MasTec is
currently evaluating strategic alternatives for its international operations and
investments in order to maximize their value. On December 31, 1998,  MasTec sold
substantially all of its operations in Spain, Argentina,  Chile, Colombia, Peru,
Puerto Rico and Venezuela.

     Customers.  MasTec  provides a full range of  infrastructure  services to a
diverse customer base.  Domestically,  MasTec provides external network services
to   incumbent   local   exchange   customers   ("ILEC's")   such  as  BellSouth
Telecommunications,  Inc.  ("BellSouth"),  US West  Communications,  Inc.,  Bell
Atlantic  Corp.,  SBC  Communications,  Inc.  and GTE  Corporation.  MasTec also
provides  external  network  services to  competitive  local  exchange  carriers
("CLEC's") such as Qwest  Communications,  Inc. and MFS Communications  Company,
Inc.,  cable  television  operators  ("CATV's")  such as  Charter  Cable,  Inc.,
Cablevision Systems, Inc., Time Warner Inc., Tele-Communications,  Inc., Comcast
Corporation,  and Cox Communications,  Inc., long distance carriers such as AT&T
Corporation  and Sprint Corp.  and  wireless  communications  providers  such as
Sprint Spectrum, L.P. Internationally, MasTec provides external network services
to the local, long distance and wireless telephone  companies formed as a result
of the  privatization of  Telecomunicacoes  Brasileiras S.A.  ("Telebras"),  the
Brazilian  telecommunications  system,  primarily in Sao Paulo,  Rio de Janeiro,
Parana and other states in the southern region of Brazil.

                                       1


     MasTec  provides  external  network  services  to power  companies  such as
Carolina  Power and Light  Co.,  Florida  Power and Light Co.,  Texas  Utilities
Company, Virginia Power Co., the City of Austin Electric Department, City Public
Service of San Antonio,  Georgia Power Co., and a number of regional  electrical
cooperatives.  MasTec  provides  internal  network  services to large  corporate
customers with multiple locations such as First Union National Bank,  Montgomery
Wards and Co., other major retailers, universities and health care providers.

     MasTec  believes  that its  customer  base allows it to take  advantage  of
technological advances and other market developments that may favor one class of
customer over another. MasTec also believes that its diverse customer base makes
it less susceptible to downturns in any particular geographic region or industry
sector. For the year ended December 31, 1998, MasTec derived  approximately 6.7%
of its revenue (or 10.6% of its North American revenue) from services  performed
for BellSouth,  its largest customer;  no other on going customer  accounted for
more than 5% of total  revenue.  See Note 9 of Notes to  Consolidated  Financial
Statements.

     Turn-key  Capabilities.  MasTec  believes it is one of the few  contractors
capable  of  providing  all  of  the  design,  construction,   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,  underground and buried cables or through wireless
transmission  to the ultimate end users' voice and data ports,  cable outlets or
cellular  stations.  MasTec can also install the switching  devices at a central
office or set up local and wide area voice, video, data and internet networks to
expand a  business'  telecommunications  infrastructure  both  inside a specific
structure or between multiple structures.

     MasTec 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. MasTec believes that this trend
will accelerate as industry  consolidations  increase and as these  consolidated
entities begin to provide bundled services to end users.  MasTec believes it has
positioned  itself as a full service  provider of external and internal  network
services to take advantage of this trend.

     Nationwide  Presence.  MasTec believes it is capable of servicing customers
across the United  States.  MasTec has  significantly  broadened its  geographic
presence in recent years beyond its historical base in the  Southeastern  United
States. Currently, MasTec has external network operations in more than 40 states
in the Southeast,  Northeast,  mid-Atlantic,  Southwest,  West and upper Midwest
regions of the country.  MasTec provides internal network services for corporate
customers and external  network  services for wireless  communication  companies
nationwide.  MasTec  believes that its customers are looking for contractors who
can  provide  services  nationwide  on a  consistent  and timely  basis and that
MasTec's  broad  geographic  presence  is a  competitive  advantage  with  these
customers.  MasTec is  developing  the brand  name  "MasTec"  across  all of its
operating  units  nationwide to further  position  itself as a single,  national
company.

Growth Strategy

     Internal Expansion. MasTec believes that current industry trends, including
deregulation    and     demonopolization,     increased     competition    among
telecommunications  and other  utility  providers,  increased  outsourcing,  and
increased  use of more  powerful  computers  and the  Internet,  will  lead to a
significant increase in the demand for its services over the next several years.
During 1998,  MasTec  realigned its North American  operations along service and
customer   lines  to  focus  on  its  core   businesses   and   believes  it  is
well-positioned  to capitalize on this anticipated  growth as one of the leading
telecommunications  infrastructure  contractors  in the  United  States.  MasTec
believes  that its strong  customer  relationships,  reputation  for quality and
reliability,  operating  efficiency,  financial strengths,  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  increased
business,  particularly  the larger,  more  technically  complex  infrastructure
projects.

     Strategic  Acquisitions.  MasTec  plans  to  continue  to  pursue  selected
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.  MasTec  focuses its  acquisition
efforts  primarily on  profitable  companies  with good  reputations  and strong
management. MasTec has acquired 38 companies, domestic and international,  since
March  1994  and has  significant  experience  in  identifying,  purchasing  and
integrating  telecommunications  infrastructure businesses. MasTec believes that
it 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.

                                       2


North American Service Lines

     MasTec's  principal  business  is  providing  telecommunications  and other
utilities infrastructure  construction services,  consisting of external network
services for telecommunications service providers, external network services for
power companies, and internal network services. For the years ended December 31,
1996, 1997 and 1998, revenue expressed as a percentage of North American revenue
generated by external network services for telecommunications  service providers
was 77.1%, 74.6% and 68.1%, respectively, by external network services for power
companies  was 1.3%,  5.2% and  18.0%,  respectively,  and by  internal  network
services was 12.5%, 12.5% and 13.4%, respectively.

External Networks - Telecommunications

     MasTec's  principal domestic business consists of external network services
for telecommunications  providers such as ILEC's, CLEC's, CATV's,  long-distance
carriers  and  wireless  communications  providers.  External  network  services
consist of all of the  services  necessary  to design,  install,  construct  and
maintain the physical facilities used to provide telecommunications service from
the  provider's  central  office,  switching  center  or cable  head-end  to the
ultimate  consumer's home or business.  These services include designing conduit
networks and fiber rings; placing and splicing of cable;  excavating trenches in
which to place the cable;  fabricating  and placing  related  structures such as
poles, anchors,  conduits,  manholes,  cabinets and closures; placing drop lines
from  the  main  distribution  terminals  to the  customer's  home or  business;
maintaining,   removing  and  replacing   these   facilities;   and   installing
transmission  and central office  equipment.  MasTec has developed  expertise in
directional  boring,  a highly  specialized  and  increasingly  common method of
placing underground and buried cable networks.

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

     Services rendered to ILEC's,  including BellSouth,  are performed primarily
under  master  service   agreements,   which  typically  are  exclusive  service
agreements to provide all of the carrier's external network requirements up to a
specified dollar amount per job within certain geographic areas. These contracts
generate  revenue  ranging  from  $3.0  million  to  $30.0  million  over  their
respective  contract  terms,  generally two to three years.  Such  contracts are
typically subject to termination at any time upon 90 to 180 days prior notice to
MasTec.  Each master  services  agreement  contemplates  hundreds of  individual
construction  and maintenance  projects  generally  valued at less than $100,000
each. These master services agreement are typically 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. MasTec currently has
43 master service agreements with telecommunications and other utility customers
covering defined regions within the United States, including 10 with BellSouth.

     In addition to services  rendered  pursuant to master  services  agreement,
MasTec provides  external network  services on individual  projects awarded on a
competitive bid basis or through individual negotiation. While such projects are
generally  substantially  larger than the individual  projects covered by master
contracts,  they typically  require  services  identical to those rendered under
master services agreement. Most of MasTec's external network contracts,  whether
master services  agreement or individual  projects,  are based either on a fixed
price  for the  entire  project  or on a unit  price  basis  for  units  of work
performed.  MasTec also  performs  work under  cost-plus  contracts  under which
MasTec is reimbursed  for certain costs plus a fee in a fixed amount or equal to
a  percentage  of  reimbursable   costs.  Many  of  MasTec's  contracts  require
performance and payment bonds.  Contracts  generally include payment  provisions
under which 5% to 10% is withheld  from payment until the contract work has been
completed.  MasTec typically  agrees to indemnify its customers  against certain
claims and  warrants the quality of its services  for  specified  time  periods,
usually one year.

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

                                       3


     Technology  convergence  has led to the  development  of "smart  highways,"
which employ video cameras, remote controlled traffic signals, "talking" message
signs,  road sensors and other  similar  devices  interconnected  by fiber optic
cable to a central  computer that monitors and controls  traffic flow  remotely.
MasTec provides infrastructure  construction services to the traffic control and
highway safety industry,  including the design,  construction and maintenance of
"smart highway" equipment and networks. These services consist of installing and
maintaining traffic signals and their associated  supporting mechanisms (such as
mast-arm  poles,  conduit,  electrical  wiring  and  sensors),   installing  and
maintaining traffic  controllers,  connecting signals and controllers with fiber
optic  cables,  and  erecting  signs on  highways  and  expressways.  The labor,
equipment and expertise  required for traffic control and highway safety systems
construction  are similar to those  required for external  network  services for
telecommunications service providers, such as the installation of fiber optic or
coaxial  cable and  conduit  for  electronically  controlled  signage  and other
traffic  control  systems.  These  services  primarily  are rendered on specific
projects   awarded  on  a  competitive  bid  basis.   Customers   include  state
transportation departments, cities and counties, highway contractors and private
developers,  principally in the Southeast. MasTec conducts this business both as
a prime  contractor and as a  subcontractor.  MasTec  currently has three master
service agreements to provide these services.

External Networks - Power

     MasTec provides  external network  services to power  companies,  including
investor-owned  utilities  and rural  cooperatives.  These  services,  which are
substantially   similar  to  the   external   network   services   provided   to
telecommunications  companies, include overhead and underground construction and
maintenance  of electrical and other  utilities  transmission  and  distribution
networks, substation construction and maintenance,  right-of-way maintenance and
restoration  of asphalt  and  concrete  surfaces.  The work often  involves  the
installation and splicing of high-voltage  transmission and distribution  lines.
Services  to many  of  these  customers  are  provided  under  exclusive  master
contracts with 2 to 3 year initial terms  expiring at various dates,  as well as
on a project by project basis awarded under  competitive  bidding and individual
negotiations.  MasTec  currently  has 42 master  service  agreements  with power
companies.

Internal Network Services

     MasTec provides design,  installation and maintenance of internal  networks
linking  the  customers'   voice,   video,   data  and  internet   computer  and
communications  networks at multiple  locations.  MasTec also  provides  systems
integration services, which involve the selection,  configuration,  installation
and  maintenance  of software,  hardware,  other  computing  and  communications
equipment  and cabling to provide an  integrated  computing  and  communications
system.  Internal  network  services is less  capital  intensive  than  external
network  construction  but requires a more  technically  proficient  work force.
MasTec  provides  these services to its customers  nationwide,  primarily on the
east and west coasts of the United States.

     MasTec provides internal network services to certain customers under master
service  agreements similar to those in the external network business that grant
MasTec the exclusive  right to provide  network  services to the customer within
certain  geographic  regions.  MasTec also provides  inside wiring on individual
projects  that are  awarded on a  competitive  bid basis or  through  individual
negotiation.  MasTec  currently  has two master  service  agreements  to provide
internal network services. MasTec intends to take advantage of the fragmentation
of the internal network  services  industry by marketing a full range of network
services to organizations  with multiple  locations  across the country.  MasTec
believes that these types of customers  increasingly are seeking a single vendor
to provide all of their network services needs.

International Operations and Investments

     MasTec operated in 1998 principally in North America (the United States and
Canada),  the Caribbean and Latin America  ("CALA") and in Spain (CALA and Spain
combined are also referred to as "International"). Combined revenue generated by
International  operations,  as a percentage  of total revenue was 39.8% in 1996,
42.8% in 1997 and 36.2% in 1998. See Note 9 of Notes to  Consolidated  Financial
Statements  for a description  of  operations by geographic  areas and segments.
MasTec provides external network construction outside of North America primarily
in Brazil  through  MasTec  Inepar S/A  Sistemas  de  Telecomunicacoes  ("MasTec
Inepar"),  a  Brazilian  company  owned  51% by  MasTec  and  49% by  Inepar  SA
Industrias e  Construcoes  ("Inepar"),  a leading  telecommunications  and power
infrastructure and equipment company in Brazil.  MasTec Inepar provides external
network services to the local,  long distance and wireless  telephone  companies
formed as a result of the privatization of Telebras, primarily in Sao Paulo, Rio
de Janeiro,  Parana and other states in the more populous and developed southern
region of Brazil.

                                       4


     In December 1998, MasTec disposed of 87% of its Spanish  operations,  which
included  affiliates in  Argentina,  Chile,  Colombia,  Peru,  Puerto Rico,  and
Venezuela  to a group of  investors.  The  investor  group  included  the  chief
executive  officer  of Sintel  and a member of its  board of  directors.  MasTec
received $0.9 million (130.5 million  pesetas at an exchange rate of 142 pesetas
to the dollar) on the date of closing and  through  March 31, 1999 has  received
$10.2 million.  Payment terms are being re-negotiated not to extend beyond 1999.
The sale  included the  assumption of the  remaining  indebtedness  of MasTec to
Telefonica S.A. for the purchase of the Spanish operations of $25.0 million (3.6
billion  pesetas).  See  Notes  2  and  9 of  Notes  to  Consolidated  Financial
Statements for a description of the Spanish  operations and additional  terms of
the sale.

     MasTec 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. MasTec also has an investment in a
company with a license to construct and operate a personal  communication system
("PCS")  in  Paraguay.  MasTec  is  seeking  to  maximize  the  value  of  these
investments and has hired investment bankers to explore strategic alternatives.

Backlog

     At December  31,  1998,  MasTec had a backlog for  domestic  operations  of
approximately  $249.9 million consisting of the uncompleted  portion of services
to be performed  under  project-specific  contracts.  MasTec does not include as
backlog the estimated  amount of work under master services  agreements  because
the customer under these  contracts is not committed to order a specific  volume
of services from MasTec.  MasTec  expects to complete  substantially  all of its
backlog at December 31, 1998 during  calendar  years 1999 through 2002, of which
approximately  88.0% of the domestic  backlog is expected to be completed during
1999.  MasTec also has  international  backlog through its Brazilian  subsidiary
MasTec Inepar of approximately  R$148.2 million  denominated in Brazilian reais,
representing  approximately  $123.4  million in U.S.  dollars as of December 31,
1998,  of which 75% is expected to be completed  during 1999.  Due to the recent
devaluation of the Brazilian currency and the likelihood of further  devaluation
and  deteriorating  economic  conditions in Brazil it is uncertain the amount of
revenue that MasTec will recognize from its international backlog. See Note 1 of
Notes to Consolidated Financial Statements.

Marketing

     MasTec  has  developed  a  company-wide  marketing  plan to  emphasize  the
"MasTec" brand name to its customers.  Marketing efforts are principally carried
out by  management of MasTec's  service  lines.  Executives of MasTec's  service
lines  market 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 services agreement and individual construction
projects.  External and internal  network  services  are also  marketed  through
commissioned  salespeople.  These  efforts are  supported by MasTec's  corporate
marketing department.

Suppliers

     MasTec's  customers  supply the majority of the raw  materials and supplies
necessary to carry out MasTec's contracted work, although MasTec is increasingly
supplying materials and supplies on turn-key projects.  MasTec obtains materials
and supplies for its own account from independent third-party providers and does
not  manufacture  any  significant  amount of  materials or supplies for resale.
MasTec is not  dependent on any one supplier for any  materials or supplies that
MasTec obtains for its own account. MasTec has not experienced any difficulty in
obtaining an adequate supply of materials and supplies.

     MasTec  also  uses  independent  contractors  to  perform  portions  of its
services and to manage work flow. These  independent  contractors  typically are
sole  proprietorships  or  small  business  entities.   Independent  contractors
typically provide their own vehicles,  tools and insurance  coverage.  MasTec is
not dependent on any single independent contractor.

                                       5


Competition

     The industry in which MasTec competes is highly competitive and fragmented.
MasTec  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  engineering  firms and equipment vendors on turn-key projects who
subcontract   construction  work  to  contractors   other  than  MasTec.   These
engineering  firms and equipment  vendors  typically are better  capitalized and
have  greater  resources  than  MasTec.  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  MasTec  believes  it is the  largest  provider  of external
network services for telecommunications service providers and power companies in
the United States and has a significant  presence in Brazil,  neither MasTec nor
any of its competitors can be considered  dominant in the industry on a national
or  international  basis.  MasTec  also  faces  competition  from  the  in-house
construction  and  maintenance  departments  of various  customers and potential
customers, which employ personnel who perform some of the same types of services
as those provided by MasTec.

     Because of the highly  competitive  bidding  environment for infrastructure
services,  the price of the  contractor's  bid  historically  has often been the
principal  factor in  determining  whether the  contractor  is awarded the work.
Smaller  competitors  are sometimes able to win bids based on price alone due to
their lower  overhead  costs.  MasTec  believes  that as demand for its services
increases,  customers  will  increasingly  consider  other factors in choosing a
contractor,   including  technical  expertise  and  experience,   financial  and
operational   resources,    nationwide   presence,   industry   reputation   and
dependability, which should benefit larger, national contractors such as MasTec.

Employees

     As of December 31, 1998,  MasTec (excluding its  unconsolidated  companies)
had approximately 8,250 employees, 7,400 of whom were employed in North American
operations  and  850  of  whom  were  employed  in   International   operations.
Approximately  250 employees are  represented by a labor union,  principally the
Communication Workers of America or the International  Brotherhood of Electrical
Workers. MasTec believes that its employee relations are good.

                      EXECUTIVE OFFICERS OF THE REGISTRANT

     Pursuant to General  Instruction G(3), the information  regarding executive
officers  of  MasTec  called  for by Item  401(b)  of  Regulation  S-K is hereby
included in this Annual Report on Form 10-K.

     The  following  is a list of the  names  and  ages of all of the  executive
officers of MasTec,  indicating  all  positions  and offices with MasTec 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                36            Chairman of the Board of Directors,
                                        President and Chief Executive Officer
Joel-Tomas Citron        36            Vice Chairman of the Board of Directors
Carmen M. Sabater        34            Senior Vice President-Finance
Jose Sariego             44            Senior Vice President-General Counsel
Arlene Vargas            32            Vice President and Controller

     Jorge Mas has been  President,  Chief  Executive  Officer and a Director of
MasTec  since March 1994 and was elected  Chairman of the Board of  Directors of
MasTec in January 1998. Prior to March 1994, Mr. Mas served as the President and
Chief  Executive  Officer  of Church & Tower,  Inc.,  MasTec's  predecessor.  In
addition, Mr. Mas is the Chairman of the Board of Directors of Neff Corporation,
a publicly-held  construction  equipment sales and leasing company, and Atlantic
Real Estate Holding Corp., a private real estate holding  company  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.

                                       6


     Joel-Tomas  Citron  has been a member of the Board of  Directors  of MasTec
since  January 1998 and was elected  Vice  Chairman of the Board of Directors in
November  1998. Mr. Citron was the managing  partner of Triscope  Capital LLC, a
private investment  partnership between January 1998 and December 1998; Chairman
of the Board of Directors of the United  States  subsidiary  of Proventus  AB, a
privately held investment  company based in Stockholm,  Sweden,  and a member of
the Executive  Committee of the group between  January 1992 and December 1997; a
member of the Board of Directors of Neff Corporation since 1998; Chairman of the
Board of American Information Systems, Inc., a provider of intranet and internet
systems solutions between September 1996 and January 1999;  between and a member
of the Board of Directors  of Nesuah  Zannex  Limited,  a  publicly-traded  full
service Israeli securities firm between May 1998 and February 1999.

     Carmen M. Sabater has been MasTec's Corporate Controller since 1994 and was
elected Senior Vice  President-Director  of Finance in December  1998.  Prior to
joining  MasTec,  Ms.  Sabater was a Senior  Manager with  Deloitte & Touche,  a
public accounting firm.

     Jose Sariego has been Senior Vice President-General Counsel of MasTec since
September  1995.  Prior to joining  MasTec,  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.

     Arlene  Vargas has been MasTec's  Vice  President and Corporate  Controller
since September 1998.  Prior to joining MasTec,  Ms. Vargas was a Senior Manager
from June 1997 to September  1998 and a Manager from June 1994 to June 1997 with
PricewaterhouseCoopers LLP, a public accounting firm. 

                                   PROPERTIES

     MasTec's  corporate  headquarters  are  located  in a  60,000  square  foot
building owned by MasTec in Miami,  Florida.  MasTec's principal  operations are
conducted from regional and field offices, equipment yards and temporary storage
locations,  none of which MasTec believes is material to its operations  because
most of MasTec's services are performed on the customers'  premises or on public
rights of way. In addition,  MasTec believes that equally  suitable  alternative
locations are available in all areas where it currently does business.

     MasTec also owns a substantial amount of construction  equipment,  which at
December  31,  1998 had a gross book  value of $170.9  million.  This  equipment
includes  trucks,  tractors,  trailers,  bucket  trucks,  backhoes,  bulldozers,
directional  boring  machines,   digger  derricks  and  cranes.  MasTec  obtains
substantially  all of its equipment from various  third-party  vendors,  none of
which MasTec is dependent  upon, and has not  experienced  any  difficulties  in
obtaining desired equipment.

                                LEGAL PROCEEDINGS

     In December 1990,  Albert H. Kahn, a shareholder  of MasTec,  filed a class
action  and  derivative  suit  in  Delaware  state  court  against  MasTec,  the
then-members  of its  Board  of  Directors  and  National  Beverage  Corporation
("NBC"), MasTec's then-largest  shareholder.  The complaint alleges, among other
things,  that  MasTec'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  suit in the
same court against MasTec, the then members of its Board of Directors, and Jorge
L. Mas, Jorge Mas and Juan Carlos Mas, the principal shareholders of MasTec. The
lawsuit  alleges,  among other things,  that MasTec's Board of Directors and NBC
breached  their  respective  fiduciary  duties  by  approving  the  terms of the
acquisition  of MasTec by the Mas family,  and that the Mas family had knowledge
of the  fiduciary  duties  owed by NBC  and  MasTec's  Board  of  Directors  and
knowingly and  substantially  participated  in the breach of these  duties.  The
lawsuit also claims derivatively that each member of MasTec's Board of Directors
engaged in  mismanagement,  waste and  breach of  fiduciary  duties in  managing
MasTec's affairs prior to the acquisition by the Mas family.

     There has been no significant  activity in either of these lawsuits in more
than two years.  MasTec  believes that the allegations in each of these lawsuits
are without merit and intends to defend these lawsuits vigorously.

                                       7


     In November  1997,  Church & Tower,  Inc.,  a  wholly-owned  subsidiary  of
MasTec,  filed a lawsuit  against  Miami-Dade  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 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. MasTec is vigorously pursuing this lawsuit.

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

               SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

         None.

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

     Market  Information.  MasTec's  Common Stock currently is listed on the New
York Stock Exchange under the symbol "MTZ".  The following table sets forth, for
the quarters  indicated,  the high and low sale prices of the Common  Stock,  as
reported by the New York Stock Exchange.

                                     Fiscal Year Ended December 31,
                     -----------------------------------------------------------
                                 1997                           1998
                          High            Low           High             Low
                     ---------------------------   -----------------------------
First Quarter ....   $   46 11/32     $   23       $   34 3/16      $   22 3/8
Second Quarter ...   $   48 5/8       $   25 1/8   $   34           $   19 13/16
Third Quarter ....   $   55 1/4       $   38 1/4   $   26 3/8       $   14 1/2
Fourth Quarter ...   $   45 1/2       $   20 3/8   $   28 3/4       $   12 3/8

     Holders.  As of March 26, 1999, there were 4,679  shareholders of record of
the Common Stock.

     Dividends.  MasTec has not declared cash dividends  since its inception and
does not anticipate  paying any cash dividends in the  foreseeable  future,  but
intends instead to retain any future earnings for  reinvestment in its business.
On January 15, 1997,  MasTec announced a three-for-two  split of its outstanding
shares of Common  Stock.  The stock  split was  effected  in the form of a stock
dividend and entitled each  shareholder of record on February 3, 1997 to receive
an additional share of Common Stock for every two shares of Common Stock held by
such  shareholder  of record on the  record  date.  The stock  split was paid on
February 28, 1997.  MasTec paid cash in lieu of fractional shares resulting from
the stock  split  based on the last sale price as reported on the New York Stock
Exchange on the record date.  All  references in this Annual Report to shares of
Common Stock have been adjusted to give effect to the stock split.

     Any future determination as to the payment of dividends will be made at the
discretion  of the  Board  of  Directors  of  MasTec  and will  depend  upon its
operating results, financial condition,  capital requirements,  general business
conditions and such other factors as the Board of Directors  deem  relevant.  In
addition,  certain  credit  agreements to which MasTec is a party  prohibit from
paying  dividends or making other  distributions on the Common Stock without the
prior  written  consent  of  the  lenders  under  such  credit  agreements.  See
"Management's  Discussion  and  Analysis of Financial  Condition  and Results of
Operations--Liquidity and Capital Resources."

                                       8


                             SELECTED FINANCIAL DATA

     The  following  statement of  operations  and balance  sheet data have been
derived from MasTec's audited  financial  statements  including the consolidated
balance  sheets  at  December  31,  1998 and 1997 and the  related  consolidated
statements of operations,  of changes in shareholders'  equity and of cash flows
for each of the years in the  three-year  period ended December 31, 1998 and the
notes thereto, appearing elsewhere in this Annual Report. The following selected
financial data should be read in conjunction  with such  consolidated  financial
statements  and the  notes  thereto,  as well as  "Management's  Discussion  and
Analysis of Financial Condition and Results of Operations."


                                                                          Year Ended December 31,
                                                       ----------------------------------------------------------
                                                        1994(1)      1995       1996(2)     1997(3)       1998(4)
                                                       ----------------------------------------------------------
                                                                                                   
                                                                   (In thousands, except per share data)
    Statement of Income Data:
    Revenue ......................................     $111,294    $174,583    $472,800    $659,439    $1,048,922
    Costs of revenue .............................       83,952     130,762     352,329     496,230       803,112
    Depreciation and amortization ................        4,439       6,913      12,000      23,465        43,313
    Compensation charge ..........................         --          --          --          --          33,765
    General and administrative expenses ..........       13,022      19,081      58,529      82,261       140,472
    -------------------------------------------------------------------------------------------------------------
    Operating income .............................        9,881      17,827      49,942      57,483        28,260
    Interest expense .............................        3,587       4,954      11,434      11,541        29,580
    Interest income ..............................        1,469       3,349       3,246       1,783         9,093
    Real estate and investment write-downs (5) ...         --        23,086        --          --            --
    Other income (expense), net (6) ..............        2,386       4,424         769       8,332        (5,155)
    -------------------------------------------------------------------------------------------------------------
    Income (loss) before provision (benefit) for
      income taxes, equity in earnings (losses) of
      unconsolidated companies and minority interest     10,149      (2,440)     42,523      56,057         2,618

    Provision (benefit) for income taxes (7) .....        2,877      (1,970)     15,591      20,944        12,550
    Equity in earnings (losses) of unconsolidated
      companies and minority interest (8) ..........        247        (139)      3,133        (449)       (3,983)
    =============================================================================================================
    Net income (loss) ............................     $  7,519    $   (609)   $ 30,065    $ 34,664    $  (13,915)
    =============================================================================================================

    Weighted average common shares outstanding (9)       24,116      23,892      24,703      26,460        27,489

    Basic earnings (loss) per share ..............     $   0.31    $  (0.03)   $   1.22    $   1.31    $    (0.51)

    Weighted average common shares outstanding (9)       24,116      23,892      25,128      27,019        27,489

    Diluted earnings (loss) per share ............     $   0.31    $  (0.03)   $   1.20    $   1.28    $    (0.51)


                                                             As of December 31,
                                                       ----------------------------------------------------------
                                                         1994        1995        1996        1997        1998(10)
                                                       ----------------------------------------------------------
                                                                            (In thousands)
    Balance Sheet Data:
    Property and equipment, net ..................     $ 40,102    $ 44,571    $ 59,602    $ 86,109    $  142,897
    Total assets .................................      142,452     170,163     483,018     630,224       735,486
    Total debt ...................................       44,185      72,089     155,192     149,057       321,832
    Total shareholders' equity ...................       50,874      50,504     103,504     223,697       204,273


     (1)  Includes the results of  operations  of Burnup & Sims Inc.  from March
          11, 1994.    
     (2)  Includes  the results of  operations  of MasTec's  Spanish  subsidiary
          Sintel from May 1, 1996.
     (3)  Includes the results of  operations of MasTec's  Brazilian  subsidiary
          MasTec Inepar from July 31, 1997.

                                       9


     (4)  Includes  the results of  operations  of MasTec's  Spanish  subsidiary
          Sintel through December 31, 1998, which includes  severance charges of
          $13.4 million,  of which $1.9 million is reflected in costs of revenue
          and $11.5 million in general and administrative expenses.
     (5)  As a result of the disposal of non-core  real estate  assets and other
          investments,  MasTec  recorded  $23.1  million  in charges in the year
          ended December 31, 1995.
     (6)  Included in 1997 results of  operations is a gain of $7.1 million from
          the partial sale of MasTec's  interest in Conecel and in 1998 includes
          a loss  of $9.2  million  related  to the  sale  of  MasTec's  Spanish
          subsidiary.
     (7)  MasTec's  effective tax rate for the year ended  December 31, 1998 was
          mainly  affected by a tax  liability  of  approximately  $7.8  million
          resulting  from the sale of 87% of MasTec's  Spanish  subsidiary,  the
          non-deductibility  of the amortization of certain  intangibles and the
          non-deductibility of other expenses.
     (8)  Included  in 1997 and  1998  results  of  operations  is the  minority
          interest related to MasTec's Brazilian subsidiary MasTec Inepar.
     (9)  Amounts have been  adjusted to reflect the  three-for-two  stock split
          effected on February 28, 1997.
     (10) As of December  31, 1998,  MasTec sold 87% of its Spanish  subsidiary,
          therefore,  the balance  sheet data as of  December  31, 1998 does not
          include the financial position of these operations.


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

Results of Operations

     Revenue is generated primarily from external and internal network services.
See Notes 1 and 9 of Notes to Consolidated  Financial  Statements.  Services are
provided to telephone companies,  public utilities,  cable television operators,
other   telecommunications   providers,   governmental   agencies   and  private
businesses.  Costs of revenue include  operations payroll and employee benefits,
subcontractor costs and expenses,  materials not supplied by the customer, fuel,
equipment  rental and insurance.  General and  administrative  expenses  include
management  salaries  and  benefits,  rent,  travel,  telephone  and  utilities,
professional fees and clerical and administrative overhead.

     The  following  tables  sets forth for each of 1996,  1997 and 1998  income
statement  data and its  related  percentage  of revenue by  geographic  region.
During 1998, MasTec recharacterized as purchases two acquisitions consummated in
1997, which were originally accounted for as pooling of interests. See Note 1 of
Notes to Consolidated Financial Statements.

North America


                                                       Year Ended December 31,
                                         ------------------------------------------------------
                                               1996              1997               1998(1)
                                         ----------------   ----------------   ----------------
                                                                       
    Revenue ...........................  $284,645  100.0%   $377,046  100.0%   $669,628  100.0%
    Costs of revenue ..................   216,940   76.2%    279,394   74.1%    506,721   75.7%
    Depreciation and amortization .....     9,942    3.5%     20,452    5.4%     37,284    5.6%
    General and administrative expenses    27,554    9.7%     41,167   10.9%    112,530   16.8%
                                         ========  ======   ========  ======   ========  ======
         Operating income .............  $ 30,209   10.6%   $ 36,033    9.6%   $ 13,093    1.9%
                                         ========  ======   ========  ======   ========  ======


     (1)  General and  administrative  expenses  includes a $33.8 million charge
          for compensation and severance charges.

      Year Ended December 31, 1998 Operating Income Compared to Year Ended
                       December 31, 1997 Operating Income

     MasTec's  North  American  revenue  was $669.6  million  for the year ended
December 31, 1998, compared to $377.0 million in 1997,  representing an increase
of $292.6  million or 77.6%.  The  increase  in North  American  revenue was due
primarily to revenue  generated from acquired  companies,  as well as internally
generated  growth.  During 1998,  MasTec  acquired 12 companies in North America
which generated revenue of approximately  $255.1 million,  representing 87.2% of
the  total  increase  in  revenue.   MasTec's  North  American  operations  have
experienced an internal  compounded  annual growth rate of  approximately  21.4%
since 1995.  For the year ended  December 31, 1998,  the  percentage of MasTec's
North   American   revenue   generated   by  external   network   services   for

                                       10


telecommunication  services  providers  was 68.1%  (74.6% in 1997),  by external
network  services for power  companies  was 18.0% (5.2% in 1997) and by internal
network services was 13.4% (12.5% in 1997).

     MasTec's  North  American  costs of revenue were $506.7 million or 75.7% of
revenue for the year ended  December  31,  1998,  compared to $279.4  million or
74.1% of revenue in 1997,  representing  an increase of $227.3 million or 81.4%.
The increase in costs of revenue as a percentage of revenue was due primarily to
numerous  inefficiencies  caused by severe weather conditions in various regions
as a result of the climactic  condition known as "El Nino",  poor performance in
three divisions and losses from a non-core contract.

     Depreciation and amortization  expense was $37.3 million or 5.6% of revenue
for the year ended  December  31,  1998,  compared  to $20.5  million or 5.4% of
revenue in 1997.

     General and administrative expenses were $112.5 million or 16.8% of revenue
for the year ended  December  31,  1998,  compared to $41.2  million or 10.9% of
revenue in 1997,  representing  an  increase  of $71.4  million  or 173.4%.  The
increase in general and  administrative  expenses  was due  primarily to a $33.8
million   compensation   charge  for  senior  management  at  certain  operating
subsidiaries,  $1.4  million  for  start-up  costs and  charges of $4.5  million
related to bad debts.  Excluding the previously mentioned expenses,  general and
administrative expenses were $72.9 million or 10.9% of revenue in 1998.

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

     Revenue from North America operations was $377.0 million for the year ended
December 31, 1997, compared to $284.6 million in 1996,  representing an increase
of $92.4  million or 32.5%.  The  increase  in North  American  revenue  was due
primarily to revenue  generated  from  acquired  companies,  as well as internal
growth.  MasTec's North American  operations  experienced an internal compounded
annual  growth  rate of  approximately  19.3%  since  1995.  For the year  ended
December 31, 1997, the percentage of MasTec's North American  revenue  generated
by external network services for  telecommunication  service providers was 74.6%
(77.1% in 1996) external  network services for electric power companies was 5.2%
(1.3% in 1996) and  12.5%  (12.5% in 1996) was  generated  by  internal  network
services.

     MasTec's  North  American  costs of revenue were $279.4 million or 74.1% of
revenue for the year ended  December  31,  1997,  compared to $216.9  million or
76.2% of revenue in 1996,  representing  an increase of $62.5  million or 28.8%.
The increase in North  American  costs of revenue was due  primarily to costs of
revenue  generated from acquired  companies as well as cost of revenue generated
by internal growth.  The decrease in costs of revenue as a percentage of revenue
was due primarily to improved margins generated during 1997 in certain projects,
as well as improved costs of revenue management.

     Depreciation and amortization  expense was $20.5 million or 5.4% of revenue
for the year  ended  December  31,  1997,  compared  to $9.9  million or 3.5% of
revenue in 1996,  representing  an  increase  of $10.5  million  or 105.7%.  The
increase in  depreciation  and  amortization  was a result of increased  capital
expenditures  ($19.7 million in 1997 compared to $7.1 million in 1996),  as well
as amortization of intangibles resulting from acquisitions.

     General and administrative expenses were $41.2 million or 10.9% of revenues
for the year ended  December  31,  1997,  compared  to $27.6  million or 9.7% of
revenue in 1996.  The  increase in general and  administrative  expenses was due
primarily  to  general  and  administrative  expenses  generated  from  acquired
companies.  The increase of general and administrative  expenses as a percentage
of revenue was due primarily to a $4.6 million reserve recorded by MasTec.

                                       11


CALA
                                                Year Ended December 31,
                                         -----------------------------------
                                             1997 (1)           1998
                                         ----------------   ----------------
    Revenue ...........................  $ 74,900  100.0%   $141,954  100.0%
    Costs of revenue ..................    63,266   84.5%    112,667   79.4%
    Depreciation and amortization .....       390    0.4%      3,349    2.4%
    General and administrative expenses     1,615    2.2%     10,636    7.4%
                                         --------  ------   --------  ------
         Operating income .............  $  9,629   12.9%   $ 15,302   10.8%
                                         ========  ======   ========  ======

     (1)  CALA operations began on August 1, 1997

      Year Ended December 31, 1998 Operating Income Compared to Five Months
                    Ended December 31, 1997 Operating Income

     MasTec's  CALA revenue was $142.0  million for the year ended  December 31,
1998,  compared  to $74.9  million in 1997,  representing  an  increase of $67.1
million or 89.5%.  The  increase in revenue was due  primarily to a full year of
operations in 1998, compared to five months in 1997.

     MasTec's  CALA  costs of revenue  were  $112.7  million  for the year ended
December 31, 1998,  compared to $63.3 million in 1997,  representing an increase
of $49.4  million  or 78.0%.  Costs of  revenue  were  79.4% of revenue in 1998,
compared to 84.5% in 1997.  The decrease in costs of revenue as a percentage  of
revenue was due primarily to the completion of certain wireless  projects in the
fourth  quarter of 1998.  MasTec does not  anticipate  CALA margins to remain at
this level in the future.

     Depreciation and  amortization  expense was $3.3 million for the year ended
December  31,  1998.  Depreciation  and  amortization  relates  primarily  to an
intangible asset resulting from one acquisition  which is being amortized over a
five year period.  Depreciation and amortization expense was 2.4% of revenue for
the year ended December 31, 1998.

     General and  administrative  expenses were $10.6 million or 7.4% of revenue
for the year ended December 31, 1998,  compared to $1.6 million or 2.2% in 1997,
representing an increase of $9.0 million or 558.6%.  The increase in general and
administrative   expenses  was  due  primarily  to  costs  of   establishing  an
infrastructure   to  support   anticipated   additional   work   following   the
privatization  of  Telebras,  which did not take place  until July 1998.  Due to
recent  economic  conditions  in Brazil,  it is uncertain  when, if at all, such
additional work will materialize.

Spain


                                                         Year Ended December 31,
                                         ------------------------------------------------------
                                              1996 (1)            1997              1998 (2)
                                         ----------------   ----------------   ----------------
                                                                       
    Revenue ...........................  $188,155  100.0%   $207,493  100.0%   $237,340  100.0%
    Costs of revenue ..................   135,389   71.9%    153,180   73.8%    183,724   77.4%
    Depreciation and amortization .....     2,058    1.1%      3,013    1.5%      2,680    1.1%
    General and administrative expenses    30,975   16.5%     39,478   19.0%     51,070   21.5%
                                         --------  ------   --------  ------   --------  -=----
         Operating income .............  $ 19,733   10.5%   $ 11,822    5.7%   $   (134)   0.0%
                                         ========  ======   ========  ======   ========  ======


     (1)  Spanish  operations  began on April 30, 1996, the date of acquisition.
     (2)  Includes a total of $13.4  million of severance  charges of which $1.9
          million is reflected in costs of revenue and $11.5  million in general
          and administrative expenses.

                                       12


      Year Ended December 31, 1998 Operating Income Compared to Year Ended
                       December 31, 1997 Operating Income

     Revenue  from  Spanish  operations  was $237.3  million  for the year ended
December 31, 1998, compared to $207.5 million in 1997,  representing an increase
of $29.8 million or 14.4%. The increase was due to acquisitions made in 1998.

     Costs of revenue were $183.7 million or 77.4% of revenue for the year ended
December  31,  1998,  compared  to $153.2  million  or 73.8% of revenue in 1997,
representing  an increase of $30.5  million or 19.9%.  The  increase in costs of
revenue as a percentage  of revenue was due  primarily to increased  labor costs
associated  with a new labor  agreement  and to $1.9  million  in  direct  labor
severance costs.

     Depreciation and  amortization  expense was $2.7 million for the year ended
December  31,  1998,  compared  to  $3.0  million  in  1997.   Depreciation  and
amortization  expense was 1.1% of revenue for the year ended  December 31, 1998,
compared to 1.5% of revenue in 1997.

     General and administrative  expenses were $51.1 million or 21.5% of revenue
for the year ended  December  31,  1998,  compared to $39.5  million or 19.0% of
revenue  in 1997,  representing  an  increase  of $11.6  million  or 29.4%.  The
increase in general and  administrative  expenses as a percentage of revenue was
due  to  severance  charges  of  $11.5  million  resulting  from  reductions  in
administrative personnel.

     Year Ended December 31, 1997 Operating Income Compared to Eight Months
                    Ended December 31, 1996 Operating Income

     Revenue  generated by Spanish  operations  was $207.5  million for the year
ended  December 31, 1997,  compared to $188.2 million in 1996,  representing  an
increase of $19.3 million or 10.3%. The increase in revenue was due primarily to
a full  year of  operations  in 1997,  compared  to eight  months  in the  1996.
MasTec's  Spanish   operations  were  negatively   impacted  during  1997  by  a
devaluation of approximately  18% in the Spanish peseta and by work stoppages in
the second half of 1997.

     Costs of revenue were $153.2 million or 73.8% of revenue for the year ended
December  31,  1997,  compared  to $135.4  million  or 71.9% of revenue in 1996,
representing  an increase of $17.8  million or 13.1%.  The  increase in costs of
revenue as a  percentage  of revenue  was due  primarily  to lower  productivity
during 1997 as a result of the work stoppages.

     General and administrative  expenses were $39.5 million or 19.0% of revenue
for the year ended  December  31,  1997,  compared to $31.0  million or 16.5% of
revenue in 1996, representing an increase of $8.5 million or 27.5%. The increase
in general and  administrative  expenses was due to a full year of operations in
1997,   compared  to  eight  months  in  1996.   The  increase  in  general  and
administrative  expenses as a percentage  of revenue was due mainly to increased
salaries and compensation expense resulting from increases in base salary.

                                       13


Consolidated Results

     The  following  table  sets forth for each of 1996,  1997 and 1998  certain
consolidated  income  statement data and its related  percentage of consolidated
revenue.


                                                                         Year Ended December 31,
                                                      --------------------------------------------------------
                                                            1996                1997                1998
                                                      ----------------    ----------------   -----------------
                                                                                      
    Operating income .............................    $ 49,942   10.6%    $ 57,483    8.7%    $ 28,260    2.7%
    Interest expense .............................      11,434    2.4%      11,541    1.8%      29,580    2.8%
    Interest income ..............................       3,246    0.7%       1,783    0.3%       9,093    0.9%
    Other income (expense), net ..................         769    0.1%       8,332    1.3%      (5,155)   0.5%
                                                      --------  ------    --------  ------    --------  ------
    Income before provision for income taxes, 
       equity in earnings (losses) of
       unconsolidated companies and minority 
       interest ..................................      42,523    9.0%      56,057    8.5%       2,618    0.3%
    Provision for income taxes ...................      15,591    3.3%      20,944    3.2%      12,550    1.2%
    Equity in earnings (losses) of  unconsolidated
       companies and minority interest ...........       3,133    0.7%        (449)  (0.0)%     (3,983)   0.4%
                                                      --------  ------    --------  ------    --------  ------
         Net income (loss) .......................    $ 30,065    6.4%    $ 34,664    5.3%    $(13,915)  (1.3)%
                                                      ========  ======    ========  ======    ========  ======
    

      Year Ended December 31, 1998 Compared to Year Ended December 31, 1997

     For  a  discussion  of  revenue,   costs  of  revenue,   depreciation   and
amortization  and  general and  administrative  expenses,  see "North  America,"
"CALA" and "Spain" above.

     Interest  expense was $29.6  million for the year ended  December 31, 1998,
compared to $11.5 million in 1997,  representing an increase of $18.0 million or
156.3%.  The  increase  in  interest  expense  was due  primarily  to  increased
indebtedness  resulting from the issuance of the Senior Notes in early 1998, the
proceeds of which were used primarily for acquisitions and to fund international
operations   investments.   See  Note  5  of  Notes  to  Consolidated  Financial
Statements.

     Included in other  expense for 1998 is a $9.2  million  loss on sale of the
Spanish  operation.  The effective income tax rate, on a consolidated  basis for
the year ended  December  31, 1998  increased  to 479%,  from 37% in 1997.  This
increase  was mainly  attributable  to the  recognition  of  approximately  $9.2
million  of a loss on sale  of  MasTec's  Spanish  operations,  however  for tax
purposes the Company  recorded a tax  provision of $7.8  million.  Excluding the
effect of the book loss on sale and the taxable  gain,  the  effective  tax rate
would have been  42.2%,  which is  attributed  to the  non-deductibility  of the
amortization  of  intangibles  and  other  expenses.  See  Note  7 of  Notes  to
Consolidated Financial Statements.

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

     Interest  expense  was $11.5  million or 1.8% of revenue for the year ended
December  31,  1997,  compared  to $11.4  million  or 2.4% of  revenue  in 1996,
representing  an increase of $107,000 or 0.9%. The decrease in interest  expense
as a  percentage  of revenue  was due to  increased  revenue  while the  average
balance on debt remained basically unchanged.

     Included  in  other  income  for  1997  is a $7.1  million  gain on sale of
MasTec's  indirect  interest  in Conecel.  See Note 11 of Notes to  Consolidated
Financial Statements.

Liquidity and Capital Resources

     MasTec's  primary  liquidity  needs are for  working  capital,  to  finance
acquisitions, for capital expenditures and to service its indebtedness. MasTec's
primary  sources of liquidity are cash flow from  operations,  borrowings  under
revolving  lines of credit and the  proceeds  from the sale of  investments  and
other assets held for sale.

                                       14


     Net cash used in operating  activities was $13.9 million for the year ended
December 31, 1998,  compared to cash  provided by operating  activities of $15.2
million in 1997. Net cash used by operating  activities of $13.9 million was due
primarily to a net loss for the year ended December 31, 1998.

     As of December 31, 1998, working capital was $244.5 million ($180.4 million
domestic and $64.1 million international)  compared to working capital of $124.1
million ($76.8 million domestic and $47.3 million international) at December 31,
1997. As of December 31, 1998, working capital included $50.9 million related to
financing  and  $46.4  million  of assets  held for sale  included  in  domestic
operations  and $27.3 million of receivables  from the sale of MasTec's  Spanish
operations  included  in  international  operations.  Working  capital  in 1998,
excluding previously described items, was $83.1 million for domestic compared to
$76.8 million in 1997. For international,  working capital increased,  excluding
Spanish operations,  from $22.8 million in 1997 to $36.8 million at December 31,
1998.

     MasTec invested cash (net of cash acquired of $5.0 million in 1998 and $3.3
million in 1997) in  acquisitions  and investments in  unconsolidated  companies
totaling  $89.1 million  during 1998  compared to $49.0 million in 1997.  During
1998, MasTec made capital expenditures of $76.4 million, primarily for machinery
and equipment  used in the  production of revenue,  compared to $21.5 million in
1997. The increase in capital  expenditures was due mainly to fleet upgrades for
acquired  companies and internal  growth.  Of the total  invested funds in 1998,
$64.5 million was related to North American  acquisitions  and $71.4 million was
related to North American capital expenditures.

     MasTec entered into agreements with certain senior management  personnel at
two of its operating  subsidiaries.  These senior  managers agreed to multi-year
employment   agreements  and  10-year   non-competition   and   non-solicitation
agreements.  Under the agreements,  MasTec paid the senior managers compensation
in the  form  of cash  and  common  stock  options.  The  cash  portion  totaled
approximately  $33.3 million,  of which  approximately $13.3 million was paid in
1998 and approximately $20.0 million was paid in the first quarter of 1999. As a
result of these agreements,  MasTec recorded a non-recurring compensation charge
of approximately  $33.8 million (including the value of vested stock options) in
the fourth quarter of 1998.

     During 1998,  MasTec  provided a customer  financing in connection with the
sale of construction services. As of December 31, 1998, MasTec had $41.8 million
outstanding  under this agreement.  MasTec  anticipates  that it will provide an
additional $8.0 million of financing under this agreement. MasTec will terminate
financing agreement as of April 30, 1999.

     Although  the PCS system is held for sale,  MasTec is committed to continue
developing the system in Paraguay.  MasTec anticipates  investing  approximately
$13.0  million  for the  development  of this  system  over the next 12  months.
Commercial operation of the system must be initiated no later than May 10, 1999,
unless extended. MasTec is seeking an extension of this date.

     During 1998,  MasTec sold 87% of its Spanish  operations  for $27.3 million
which is  recorded  in other  current  assets in the  accompanying  consolidated
balance  sheet as of December 31, 1998.  The proceeds from the sale will be used
for general corporate purposes including reducing indebtedness.

     MasTec announced a stock repurchase program in April 1998. Through December
1998,  MasTec had  purchased  a total of 667,000  shares at an average  price of
$20.58.

     In December 1998, MasTec increased its existing credit facility from $125.0
million to $165.0  million  (the "Credit  Facility"),  with a group of financial
institutions  led by  BankBoston,  N.A.  Amounts  outstanding  under the  Credit
Facility  mature on June 9,  2000.  Upon  written  request  by MasTec and at the
bank's sole discretion, the maturity date of the Credit Facility may be extended
for  successive  annual  periods  up to a final  maturity  date of June 9, 2002.
MasTec is required to pay an unused  facility  fee ranging from .25% to .50% per
annum on the facility, depending upon certain financial covenants.

     The Credit Facility is secured by a pledge of shares of certain of MasTec's
subsidiaries.  Interest  under the Credit  Facility  accrues at rates based,  at
MasTec's  option,  on the  agent  bank's  Base  Rate plus a margin of up to .50%
depending on certain financial covenants or 1% above the overnight federal funds
effective rate, whichever is higher, or its LIBOR Rate (as defined in the Credit
Facility)  plus a margin  of 1.00% to  2.25%,  depending  on  certain  financial
covenants.

     MasTec had  outstanding  $18.7  million in standby  letters of credit as of
December 31, 1998.

                                       15


     In January 1998,  MasTec issued $200.0  million  principal  amount of 7.75%
senior  subordinated  notes (the  "Senior  Notes")  due 2008 with  interest  due
semi-annually.  The net proceeds were used  primarily for  acquisitions  and for
other corporate purposes.

     The  Credit  Facility  and the Senior  Notes  contain  customary  events of
default and  covenants  which  prohibit,  among  other  things,  making  certain
investments in excess of a specified amount,  incurring additional  indebtedness
in excess of a  specified  amount,  paying  dividends  in excess of a  specified
amount,  making capital  expenditures in excess of a specified amount,  creating
liens, prepaying other indebtedness, including the Senior Notes, and engaging in
certain  mergers  or  combinations  without  the prior  written  consent  of the
lenders.  The Credit  Facility also  provides that MasTec must maintain  certain
financial ratio coverages,  requiring,  among other things minimum ratios at the
end of each fiscal quarter of debt to earnings and earnings to interest expense.
See Note 5 of Notes to Consolidated Financial Statements.

     MasTec  expects to finance  its  current  working  capital  needs,  capital
expenditures, debt service obligations and other commitments from cash generated
from  operations,  borrowings under its existing Credit Facility and the sale of
investments and other assets. Subsequent to December 31, 1998, MasTec has signed
letters of intent to acquire  two  external  network  and one  internal  network
services contractors, subject to a number of conditions. MasTec anticipates that
available cash, cash flows from operations and borrowing  availability under the
Credit  Facility will be sufficient  to satisfy  MasTec's  liquidity and working
capital  requirements for the foreseeable  future;  however,  to the extent that
MasTec should desire to increase its financial flexibility and capital resources
or require or choose to fund future capital  commitments from sources other than
operating cash or from borrowings under its existing Credit Facility, MasTec may
consider raising additional capital by increasing its Credit Facility or through
the offering of equity and/or debt securities in the public or private  markets.
There can be no assurance, however, that additional capital will be available to
MasTec on acceptable terms, or at all.

     MasTec owns interest in a number of foreign operations,  primarily in Latin
America,  which  are  subject  to  greater  political,  monetary,  economic  and
regulatory risks than its domestic operations. During January 1999 the Brazilian
government  allowed  its  currency  to trade  freely  against  other  currencies
resulting in an immediate  devaluation of the Brazilian reais. The impact on the
devaluation  on an operation  depends on the  devaluation's  effect on the local
economy and the ability of an operation to raise prices and/or reduce  expenses.
Additionally,  the  economies  of  other  countries  in Latin  America  could be
adversely  impacted by Brazil's economic and monetary  problems.  The likelihood
and extent of further  devaluation  and  deteriorating  economic  conditions  in
Brazil and other Latin America  countries and the resulting  impacts on MasTec's
results  of  operations,  financial  position  and  cash  flows  cannot  now  be
determined.  MasTec  monitors its currency  exchange risk but currently does not
hedge  against  this risk.  There can be no  assurance  that  currency  exchange
fluctuations  or other  economic  problems  will not adversely  affect  MasTec's
results of operations, financial position and cash flows.

Year 2000

     The Year 2000 issue is the  result of  computer  programs  using two digits
rather  than  four to define  the  applicable  year.  Any of  MasTec's  computer
programs  that have  time-sensitive  software may recognize a date using "00" as
the year 1900 rather than the year 2000.  This could result in a system failure,
disruption of operations and/or a temporary inability to conduct normal business
activities.

     MasTec has  undertaken a Year 2000 project which  includes an assessment of
telecommunications  equipment,  computer  equipment,  software,  database,  data
services,  network infrastructure,  and telephone equipment.  MasTec's Year 2000
plan addresses the Year 2000 issue in four phases: (1) inventory and assessment;
(2) impact analysis and implementation planning; (3) implementation and testing;
and (4) on-going and monitoring.  As each phase is completed,  project  progress
will be tracked  against  planned  targets,  and  resource  adjustments  made as
necessary. At this time, a majority of MasTec's information systems and embedded
devices have been inventoried and assessed, and MasTec has begun impact analysis
and implementation  planning,  as well as some  implementation and testing.  The
project is estimated to be complete by the end of 1999, prior to any anticipated
impact on MasTec's  operating  systems.  MasTec  believes  that with upgrades to
existing  software,  conversions  to new  software  and  replacement  of certain
products  and  equipments,  the  Year  2000  issue  will  not  pose  significant

                                       16


operational problems.  Based on its current assessment efforts,  MasTec does not
believe  that  Year  2000  issues  will have a  material  adverse  effect on its
financial condition or results of operations.  If, however,  necessary upgrades,
replacements  and  conversions  are not  made or are not  completed  on a timely
basis,  the Year  2000  issue may have a  material  adverse  effect on  MasTec's
business,  financial  condition  and results of  operations.  MasTec's Year 2000
issues  and any  potential  business  interruptions,  costs,  damages  or losses
related  thereto,  are  dependent,  to a  certain  degree,  upon the  Year  2000
readiness of third  parties such as vendors and  suppliers.  As part of MasTec's
Year  2000  efforts,   formal   communications  with  all  significant  vendors,
suppliers,  banks and clients are being pursued to determine the extent to which
related  interfaces with MasTec's  systems are vulnerable if these third parties
fail to remediate their Year 2000 issues. There cannot be any assurance that any
such third parties will address any Year 2000 issues that they have or that such
third parties' systems will not materially adversely affect MasTec's systems and
operations.

     MasTec  continues  to assess the Year 2000 issue with  respect to  internal
business systems, and has initiated the implementation of corrective measures to
address the issue.  MasTec is evaluating  the need for  contingency  planning at
this time of its system and embedded  devices.  The  assessment of third parties
external to MasTec is underway, and may reveal the need for contingency planning
based on the progress and findings of the Year 2000 project.

     MasTec will  utilize both  internal and external  resources to complete and
test the Year 2000 project.  At the present time,  MasTec is estimating the cost
of this project.  Through  December 31, 1998,  related  costs  incurred were not
material,  and  MasTec  does not  expect  that the  total  cost of its Year 2000
project  will be material to its  financial  position or results of  operations.
Project  costs and the targeted  completion  date will be based on  management's
best  estimates,  which will be derived from utilizing  numerous  assumptions of
future events,  including the continued  availability of certain resources,  the
ability  to  locate  and  correct  all  relevant  computer  codes,  third  party
modification plans and other factors.  There can be no assurance these estimates
will be  achieved or that the actual  results  will not differ  materially  from
those anticipated.

Seasonality

     MasTec's North America  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.  This  seasonality is primarily the result of
customer budgetary  constraints and preferences and the effect of winter weather
on external network activities. Certain U.S. customers, particularly the ILEC's,
tend to complete  budgeted capital  expenditures  before the end of the year and
defer  additional  expenditures  until the following  budget year.  Revenue in a
local currency from MasTec Inepar is not expected to fluctuate seasonally.

Impact of Inflation

     The primary  inflationary factor affecting MasTec's operations is increased
labor costs. MasTec has not experienced  significant increases in labor costs to
date.  Competition for qualified personnel could increase labor costs for MasTec
in the future.  MasTec's  international  operations may, at times in the future,
expose it to high inflation in certain foreign  countries.  During 1998,  MasTec
generated  approximately 17.5% of its total revenue (excluding revenue generated
from  MasTec's  Spanish  operations  which  were  sold in  December  1998)  from
international   operations  that  are   susceptible  to  currency   devaluation.
Management anticipates that revenue from MasTec's international  operations will
be less significant to MasTec's  operations in the foreseeable future due to its
current  intentions to dispose of them,  however,  the  likelihood and extent of
further  devaluation and deteriorating  economic  conditions in Brazil and other
Latin  America  countries  and the  resulting  impacts  on  MasTec's  results of
operations, financial position and cash flows cannot now be determined.


           QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     See Notes 1 and 5 of Notes to  Consolidated  to  Financial  Statements  for
disclosures about market risk.

                                       17




                   FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA



                                                                           Page

Reports of Independent Accountants........................................   19

Consolidated Statements of Operations for the Years Ended 
  December 31, 1996, 1997, and 1998.......................................   21

Consolidated Balance Sheets as of December 31, 1997 and 1998..............   22

Consolidated Statement of Changes in Shareholders' Equity for 
     the Years Ended December 31, 1995, 1996, 1997 and 1998...............   23

Consolidated Statements of Cash Flows for the Years Ended 
     December 31, 1996, 1997, and 1998....................................   24

Notes to Consolidated Financial Statements................................   27




                                       18




                        REPORT OF INDEPENDENT ACCOUNTANTS



To the Board of Directors and
  Shareholders of MasTec, Inc.:


 
     In our opinion, based upon our audits and the report of other auditors, the
accompanying consolidated balance sheets and the related consolidated statements
of operations, changes in shareholders' equity and cash flows present fairly, in
all  material  respects,   the  financial  position  of  MasTec,  Inc.  and  its
subsidiaries  ("MasTec") at December 31, 1997 and 1998, and the results of their
operations  and their cash flows for each of the three years in the period ended
December 31, 1998 in conformity with generally accepted  accounting  principles.
These  consolidated  financial  statements  are the  responsibility  of MasTec's
management;  our  responsibility is to express an opinion on these  consolidated
financial  statements  based on our  audits.  We did not audit the  consolidated
financial statements of Sintel,  S.A., a wholly-owned  subsidiary until December
31, 1998 which statements reflect total assets of $195.2 million at December 31,
1997 and total revenues of $207.2 million and $207.6 million for the years ended
December 31, 1997 and 1998, respectively. Those statements were audited by other
auditors  whose  report  thereon  has  been  furnished  to us,  and our  opinion
expressed herein, insofar as it relates to the amounts included for Sintel, S.A.
is based solely on the report of the other auditors.  We conducted our audits of
the  consolidated  financial  statements in accordance  with generally  accepted
auditing  standards  which  require that we plan and perform the audit to obtain
reasonable  assurance about whether the  consolidated  financial  statements are
free of material  misstatement.  An audit includes  examining,  on a test basis,
evidence  supporting the amounts and disclosures in the  consolidated  financial
statements,  assessing the accounting  principles used and significant estimates
made by management,  and evaluating the overall consolidated financial statement
presentation.  We  believe  that our  audits  and the  report of other  auditors
provide a reasonable basis for the opinion expressed above.
  



/s/ PRICEWATERHOUSECOOPERS LLP
- -------------------------------
PRICEWATERHOUSECOOPERS LLP
Miami, Florida

February 10, 1999



                                       19


                        REPORT OF INDEPENDENT ACCOUNTANTS


To the Shareholders of
Sistemas e Instalaciones de Telecomunicacion, S.A.:



We have audited the consolidated  balance sheet of SINTEL, S.A. and subsidiaries
("Sintel") as of December 31, 1998 and 1997, the related consolidated statements
of income  and cash  flows for the two years  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 audits.

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 provide a reasonable basis for our opinion.

On December 31, 1998,  the  agreement  signed with  Telefonica  de Espana,  S.A.
terminated.  Such contract  guaranteed a minimum contract  revenue amount.  As a
result  of this  situation,  the  Company  has a  strategy  to  restructure  its
operations as well as a planned expansion and  diversification of its commercial
activities in Spain and Latin America, as explained in Note 1.

In  relation  to what is  described  in the  previous  paragraph,  during 1998 a
restructure of its  operations  was executed which resulted in an  extraordinary
expense of 1.810 millions pesetas related to severance payments to personnel. In
view of the extraordinary nature of such restructure,  management  considered it
appropriate  to  compensate  part of such  cost by  reversing  1.000,8  millions
pesetas  from the  voluntary  reserves  with a  corresponding  increase  to 1998
income,  recorded  as  described  in Notes 10 and 18.  Although  such  voluntary
reserves are free to be disposed of by the Board of Directors, Spanish Generally
Accepted  Accounting  Principles  does not permit such reversal and the ultimate
recording of extraordinary income in 1998. Therefore, in accordance with General
Accepted Accounting Principles,  net income and the voluntary reserves should be
reduced and increased,  accordingly,  by 1000,8 millions pesetas. Such treatment
does not impact the capital accounts of the Company.

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,  except for the effects of the matter described in the preceding
paragraph 4, the accompanying  consolidated financial statements express, in all
material respects,  the capital and the financial  position of Sintel,  S.A. and
consolidated  subsidiaries  at December  31, 1998 and 1997 and the result of its
operations  for the two years  then ended and  includes  all the  necessary  and
sufficient  information for an adequate  interpretation  and  comprehension,  in
accordance with generally accepted accounting principles applied on a consistent
basis.


/s/ ARTHUR ANDERSEN
- ---------------------
ARTHUR ANDERSEN
Madrid, Spain

March 31, 1999

                                       20


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



                                                        Year Ended December 31,
                                                 ------------------------------------
                                                    1996         1997         1998
                                                 ----------   ----------   ----------
                                                                  
 
Revenue ......................................   $  472,800   $  659,439   $1,048,922
Costs of revenue .............................      352,329      495,840      803,112
Depreciation and amortization ................       12,000       23,855       43,313
Compensation charge ..........................         --           --         33,765
General and administrative expenses ..........       58,529       82,261      140,472
                                                 ----------   ----------   ----------

    Operating income .........................       49,942       57,483       28,260
Interest expense .............................       11,434       11,541       29,580
Interest income ..............................        3,246        1,783        9,093
Other income (expense), net ..................          769        8,332       (5,155)
                                                 ----------   ----------   ----------
Income before provision for income taxes,
    equity in earnings of unconsolidated
    companies and minority interest ..........       42,523       56,057        2,618
Provision for income taxes ...................       15,591       20,944       12,550
Equity in earnings of unconsolidated companies        3,040        2,897        1,906
Minority interest ............................           93       (3,346)      (5,889)
                                                 ==========   ==========   ==========
Net income (loss) ............................   $   30,065   $   34,664   $  (13,915)
                                                 ==========   ==========   ==========

Weighted average common shares outstanding ...       24,703       26,460       27,489
Basic earnings (loss) per share ..............   $     1.22   $     1.31   $    (0.51)

Weighted average common shares outstanding ...       25,128       27,019       27,489
Diluted earnings (loss) per share ............   $     1.20   $     1.28   $    (0.51)





     The accompanying notes are an integral part of these consolidated financial
statements.
                                       21


                                  MASTEC, INC.
                           CONSOLIDATED BALANCE SHEETS
                                 (In thousands)


                                                                     December 31,
                                                              ----------------------
                                                                 1997         1998
                                                              ---------    ---------
                                                                     
         Assets

Current assets:
    Cash and cash equivalents ..............................  $   6,063    $  19,864
    Accounts receivable, unbilled revenue and retainage, net    346,596      284,575
    Inventories ............................................      8,746       13,423
    Assets held for sale ...................................     10,782       49,973
    Other current assets ...................................     22,009       59,601
                                                              ---------    ---------
         Total current assets ..............................    394,196      427,436

Property and equipment, net ................................     86,109      142,897
Investments in unconsolidated companies ....................     48,160        5,886
Intangibles, net ...........................................     99,890      142,245
Other assets ...............................................      1,869       17,022
                                                              ---------    ---------
         Total assets ......................................  $ 630,224    $ 735,486
                                                              =========    =========

         Liabilities and Shareholders' Equity

Current liabilities:
    Current maturities of debt .............................  $  54,562    $  11,143
    Accounts payable and accrued expenses ..................    166,596       84,372
    Other current liabilities ..............................     48,950       87,417
                                                              ---------    ---------
         Total current liabilities .........................    270,108      182,932
                                                              ---------    ---------

Other liabilities ..........................................     41,924       37,592
                                                              ---------    ---------
Long-term debt .............................................     94,495      310,689
                                                              ---------    ---------
Commitments and contingencies (Note 10)

Shareholders' equity:
    Common stock ...........................................      2,758        2,738
    Capital surplus ........................................    154,013      149,479
    Retained earnings ......................................     70,392       56,477
    Accumulated other comprehensive income .................     (3,466)      (4,421)
                                                              ---------    ---------
         Total shareholders' equity ........................    223,697      204,273
                                                              ---------    ---------
         Total liabilities and shareholders' equity ........  $ 630,224    $ 735,486
                                                              =========    =========


     The accompanying notes are an integral part of these consolidated financial
statements.
                                       22


                                  MASTEC, INC.
            CONSOLIDATED STATEMENT OF CHANGES IN SHAREHOLDERS' EQUITY
                                 (In thousands)


                                                                                       Foreign                          Accumulated
                                                 Common Stock                         Currency                             Other
                                               -----------------   Capital  Retained Translation  Treasury             Comprehensive
                                                Shares   Amount    Surplus  Earnings Adjustments    Stock     Total        Income
                                                                                                 
- ---------------------------------------------------------------------------------------------------------------------   ------------
Balance December 31, 1995 ...................   26,435  $  2,643  $134,186  $  5,663  $      1    $(91,989) $ 50,504    $     5,664
Net income ..................................                                 30,065                          30,065         30,065
Foreign currency translation adjustment .....                                             (803)                 (803)          (803)
Stock issued from treasury for stock
    options exercised .......................                           48                             523       571           --
Tax benefit resulting from stock
    option plan .............................                          513                                       513           --
Stock issued from treasury for an
    acquisition .............................                        8,844                           2,201    11,045           --
Stock issued for debentures from
    treasury ................................                        5,492                           6,117    11,609           --
- ---------------------------------------------------------------------------------------------------------------------   ------------
Balance December 31, 1996 ...................   26,435     2,643   149,083    35,728      (802)    (83,148)  103,504         34,926
Net income ..................................                                 34,664                          34,664         34,664
Foreign currency translation adjustment .....                                           (2,664)               (2,664)        (2,664)
Stock issued from treasury for options                                    
    exercised ...............................                          206                             979     1,185           --
Tax benefit resulting from stock
    option plan .............................                        1,538                                     1,538           --
Stock issued for acquisitions ...............    1,621       162    76,219                                    76,381           --
Stock issued from treasury for an                                 
    acquisition .............................                        4,479                           1,603     6,082           --
Stock issued for stock dividend from
    treasury ................................                      (75,802)                         75,802      --             --
Stock issued from treasury ..................                        3,007                                     3,007           --
- ---------------------------------------------------------------------------------------------------------------------   ------------
Balance December  31, 1997 ..................   28,056     2,805   158,730    70,392    (3,466)     (4,764)  223,697         66,926
Retirement of treasury stock ................     (476)      (47)   (4,717)     --        --         4,764      --             --
                                               --------  -------- --------- --------- ---------   --------- ---------   ------------
Balance December 31, 1997 ...................   27,580     2,758   154,013    70,392    (3,466)       --     223,697         66,926
Net loss ....................................                                (13,915)                        (13,915)       (13,915)
Accumulated other comprehensive income                                                    (955)                 (955)          (955)
Stock issued, primarily for 
    acquisitions and stock options            
    exercised ...............................      469        47     8,721                                     8,768           --
Tax benefit resulting from stock                                   
    option plan .............................                          403                                       403           --
Repurchase of common stock ..................     (667)      (67)  (13,658)                                  (13,725)          --
- ---------------------------------------------------------------------------------------------------------------------   ------------
Balance December 31, 1998 ...................   27,382  $  2,738  $149,479  $ 56,477  $ (4,421)   $   --   $ 204,273    $    52,056
=====================================================================================================================   ============


     The accompanying notes are an integral part of these consolidated financial
statements.
                                       23


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


                                                                Year Ended December 31,
                                                          ------------------------------------
                                                             1996         1997         1998
                                                          ----------   ----------   ----------
                                                                           
Cash flows from operating activities:
   Net income (loss) ..................................   $  30,065    $  34,664    $ (13,915)
   Adjustments to reconcile net income (loss) to net 
     cash provided by (used in) operating activities:
     Depreciation and amortization ....................      12,000       23,855       43,313
     Minority interest ................................         (93)       3,346        5,889
     Equity in earnings of unconsolidated companies ...      (3,040)      (2,897)      (1,906)
     Deferred tax expense (benefit) ...................       2,574       (4,991)       6,974
     (Gain) loss on sale of assets ....................        (365)      (6,848)       8,918
     Changes in assets and liabilities net of 
       effect of acquisitions and divestitures:
       Accounts receivable, unbilled revenue and retainage  (12,013)     (28,809)     (34,942)
       Inventories and other current assets ...........      (2,448)          64      (16,759)
       Other assets ...................................      (2,102)     (10,889)     (27,341)
       Accounts payable and accrued expenses ..........      24,492        5,348       (2,017)
       Other current liabilities ......................      (6,706)       7,326       13,385
       Other liabilities ..............................      (4,942)      (4,988)       4,548
                                                          ----------   ----------   ----------
Net cash provided by (used in) operating activities ...      37,422       15,181      (13,853)
                                                          ----------   ----------   ----------
Cash flows from investing activities:
    Capital expenditures ..............................      (7,059)     (21,534)     (76,445)
    Cash paid for acquisitions, net of cash acquired ..      (5,034)     (45,606)     (75,745)
    Distributions from unconsolidated companies .......        --          2,130         --
    Investments in unconsolidated companies ...........      (1,212)      (3,364)     (13,384)
    Repayment (advances)  of notes receivable, net ....       1,273          565      (18,667)
    Repayment of notes from shareholders ..............        --            780         --
    Net proceeds from sale of assets ..................       9,404       29,628        5,600
                                                          ----------   ----------   ----------
Net cash used in investing activities .................      (2,628)     (37,401)    (178,641)
                                                          ----------   ----------   ----------
Cash flows from financing activities:
    Proceeds from revolving credit facilities .........      17,476       57,328        5,032
    Proceeds from Senior Notes ........................        --           --        199,724
    Other borrowings ..................................      21,739       19,936       35,106
    Debt repayments ...................................     (70,320)     (59,059)     (17,946)
    Proceeds from issuance of common stock ............         792        6,264        3,779
    Stock repurchased .................................        --           --        (13,725)
    Financing costs ...................................        --           (587)      (4,993)
                                                          ----------   ----------   ----------
Net cash (used in) provided by financing activities ...     (30,313)      23,882      206,977
                                                          ----------   ----------   ----------
Net increase in cash and cash equivalents .............       4,481        1,662       14,483
Net effect of translation on cash .....................        (803)        (353)        (682)
Cash and cash equivalents - beginning of period .......       1,076        4,754        6,063
                                                          ----------   ----------   ----------
Cash and cash equivalents - end of period .............   $   4,754    $   6,063    $  19,864
                                                          ==========   ==========   ==========

Supplemental  disclosures of cash flow information:  
Cash paid during the period for:
    Interest                                              $  10,029    $   8,727    $  21,795
                                                          ==========   ==========   ==========
    Income taxes                                          $  11,676    $  10,377    $   6,593
                                                          ==========   ==========   ==========


     The accompanying notes are an integral part of these consolidated financial
statements.
                                       24


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


Supplemental disclosure of non-cash investing and financing activities:

                                                     Year Ended December 31,
                                               -------------------------------
                                                  1996       1997       1998
                                               ---------   --------   --------
Acquisitions accounted for under purchase 
  method of accounting:
     Fair value of assets acquired:
     Accounts receivable ....................   $248,087   $ 43,966   $ 35,184
     Inventories ............................      2,980      1,681      2,565
     Other current assets ...................     12,661      2,127      1,615
     Property and equipment .................     13,148     27,480     27,168
     Investments in unconsolidated companies       9,373       --         --
     Real estate and other assets ...........      6,385      3,973      3,830
                                                --------   --------   --------
       Total non-cash assets ................    292,634     79,227     70,362
                                                --------   --------   --------
Liabilities .................................    162,928     32,238     20,623
Long-term debt ..............................     78,966      8,535     18,609
                                                --------   --------   --------
       Total liabilities assumed ............    241,894     40,773     39,232
                                                --------   --------   --------
Net non-cash assets acquired ................     50,740     38,454     31,130
Cash acquired ...............................      1,130      3,304      4,975
                                                --------   --------   --------
Fair value of net assets acquired ...........     51,870     41,758     36,105
Excess over fair value of assets acquired ...      4,956     98,088     55,314
                                                --------   --------   --------
Purchase price ..............................   $ 56,826   $139,846   $ 91,419
                                                ========   ========   ========

Notes payable issued in acquisitions ........   $ 36,561   $    130   $ 10,199
Acquisition costs, cash paid and common 
  stock is acquisitions .....................     18,015    129,809     81,220
Contingent consideration ....................      2,250      9,907       --
                                                --------   --------   --------
Purchase price ..............................   $ 56,826   $139,846   $ 91,419
                                                ========   ========   ========
Property acquired through financing arrangements$  8,550   $    413   $   --
                                                ========   ========   ========
Disposal of Sintel:
   Accounts receivable ...........................................    $137,214
   Inventories ...................................................       2,774
   Other current assets ..........................................      37,722
   Property and equipment ........................................      17,251
   Other assets ..................................................       2,825
                                                                      --------
     Total non-cash assets .......................................     197,786
                                                                      --------
Liabilities ......................................................     109,448
Long-term debt ...................................................      25,013
                                                                      --------
     Total liabilities ...........................................     134,461
                                                                      --------
Net non-cash assets sold .........................................      63,325
Cash .............................................................       2,234
Investment retained ..............................................      (4,072)
                                                                      --------
Fair value of net assets sold ....................................      61,487
Net loss on sale .................................................      (9,222)
                                                                      --------
Sale price .......................................................    $ 52,265
                                                                      ========
Assumption of debt ...............................................      25,013
Seller financing .................................................      27,252
                                                                      --------
Sale price .......................................................    $ 52,265
                                                                      ========

     The accompanying notes are an integral part of these consolidated financial
statements. 
                                       25


                                   MASTEC, INC
                CONSOLIDATED STATEMENTS OF CASH FLOWS (continued)


     In 1996, MasTec 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, MasTec 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.

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

     In 1997, MasTec issued  approximately  1,621,000 shares of common stock for
domestic  acquisitions,  of which 250,000 shares were issued from treasury stock
at a cost of approximately $1.6 million.

     In 1997,  MasTec  converted a note receivable and accrued  interest thereon
totaling $29 million into stock of
Conecel.

     In 1998,  MasTec  issued  approximately  158,200  shares  of  common  stock
primarily as payment for contingent  consideration related to 1997 acquisitions.
In addition,  MasTec  issued  approximately  58,600 shares as bonuses to certain
employees and fees to directors.



     The accompanying notes are an integral part of these consolidated financial
statements. 
                                       26


                                  MASTEC, INC.
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                        December 31, 1996, 1997 and 1998


     Note 1 - Nature of the  Business  and  Summary  of  Significant  Accounting
Policies

     MasTec is one of the  preeminent  builders of internal and external  voice,
video, data, internet and other computer and communications networks for leading
telecommunications  service providers,  cable television operators,  Fortune 500
corporations  and power  companies.  MasTec  designs,  installs,  constructs and
maintains aerial,  underground and buried copper,  coaxial and fiber optic cable
networks as well as wireless antenna  networks  ("external  network  services").
Clients for  MasTec's  external  network  services  include  major  domestic and
international  telecommunication  service  providers,  incumbent and competitive
local exchange carriers, cable television operators,  long-distance carriers and
wireless phone companies.  MasTec also provides external network services to the
electric power  industry  ("power") that are similar to the services it provides
to  telecommunications  customers.  Additionally,  MasTec designs,  installs and
maintains   integrated  local  and  wide  area  networks  and  provides  systems
integration  and other value added services  ("internal  network  services") for
corporate customers and other organizations with multiple locations.
 
     For the years ended, December 31, 1996, 1997 and 1998, revenue expressed as
a percentage of North American  revenue,  generated by external network services
for   telecommunications   service   providers  was  77.1%,   74.6%  and  68.1%,
respectively,  by external  network  services for electric  power  companies was
1.3%, 5.2% and 18.0%, respectively,  and by internal network services was 12.5%,
12.5% and 13.4%,  respectively.  MasTec  operated in 1998  principally  in North
America (the United States and Canada), the Caribbean and Latin America ("CALA")
and in Spain (CALA and Spain combined are also referred to as  "International").
Combined revenue generated by International operations, as a percentage of total
revenue was 39.8% in 1996, 42.8% in 1997 and 36.2% in 1998.  See Note 9.

     On December 31, 1998, MasTec sold its Spanish  operations,  whose principal
customer was Telefonica.

     In July and August 1997, MasTec  consummated two  acquisitions,  which were
accounted for as pooling of interests.  In July 1998,  MasTec  applied  purchase
accounting  to  these   acquisitions  due  to  transactions   contemplated  with
management of such  acquired  companies  that were later  finalized in 1998 (see
Note 2). Accordingly,  MasTec's  consolidated  financial  statements include the
results of operations from the dates of such  acquisitions  and prior years have
been adjusted  accordingly.  The change in  accounting  resulted in increases in
capital  surplus and  intangibles  assets of  approximately  $53.0 million as of
December  1997.  As to the statement of income,  the restated 1997 revenue,  net
income and  earnings  per share are $659.4  million,  $34.7  million  and $1.28,
respectively,  in  comparison  to the  originally  reported  amounts  of  $703.4
million, $42.7 million and $1.44, respectively.

     A  summary  of  the  significant   accounting   policies  followed  in  the
preparation of the accompanying  consolidated  financial statements is presented
below:

     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.  The more significant  estimates relate to MasTec's
reserve for allowance for bad debts,  accrued workers'  compensation claims, and
the  realizability  of  certain  intangibles  and assets  held for sale.  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
transaction  have  been  eliminated.   Certain  prior  year  amounts  have  been
reclassified to conform to the current presentation.

     Comprehensive income (loss). As reflected in the consolidated  statement of
changes in shareholders' equity, comprehensive income is a measure of net income
and all other  changes in equity of MasTec that result from  transactions  other
than with  shareholders.  Comprehensive  income  (loss)  consists  of net income
(loss) and foreign currency translation adjustments.

     Foreign currency. Assets and liabilities of foreign subsidiaries and equity
with a functional  currency  other than U.S.  dollars are  translated  into U.S.
dollars at exchange rates in effect at the end of the reporting period.  Foreign
entity  revenue and expenses  are  translated  into U.S.  dollars at the average

                                       27


rates that prevailed during the period.  The resulting net translation gains and
losses are reported as foreign currency translation adjustments in shareholders'
equity as a component of other accumulated  comprehensive income. Exchange gains
and losses on transactions of MasTec and its equity investments denominated in a
currency other than their functional  currency are generally included in results
of operations as incurred.
 
     International  Operations.  MasTec  owns  interest  in a number or  foreign
operations,  primarily in Latin America, which are subject to greater political,
monetary,  economic and regulatory  risks than its domestic  operations.  During
January  1999 the  Brazilian  government  allowed its  currency to trade  freely
against other currencies resulting in an immediate  devaluation of the Brazilian
reais.   The  impact  of  the  devaluation  on  an  operation   depends  on  the
devaluation's  effect on the local  economy and the ability of an  operation  to
raise  prices  and/or  reduce  expenses.  Additionally,  the  economies of other
countries in Latin America could be adversely  impacted by Brazil's economic and
monetary  problems.  The  likelihood  and  extent  of  further  devaluation  and
deteriorating economy conditions in Brazil and other Latin America countries and
the resulting impacts on MasTec's results of operations,  financial position and
cash flows is not known.
  
     Revenue recognition.  Revenue and related costs for short-term construction
projects (i.e.,  generally  projects with a 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. Work in process on
contracts  is  based  on work  performed  but not  billed  to  customers  as per
individual contract terms.

     MasTec   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. Basic earnings per common share is computed by dividing
income available to common shareholders by the weighted average number of common
shares  outstanding.  Diluted  earnings  per common  share  include the dilutive
effect of stock options 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 under the treasury method
of  accounting  of  approximately  425,000 and 559,000 at December  31, 1996 and
1997, respectively.

     Potentially  dilutive  shares,  as of December 31, 1998 which have not been
included in the diluted per share  calculation  include  336,000  shares because
their  effects  would be  anti-dilutive  due to the  loss  incurred  by  MasTec.
Accordingly,  for 1998,  diluted net loss per common  share is the same as basic
net loss per common share.

     Cash and cash equivalent.  MasTec considers all short-term investments with
maturities of three months or less when purchased to be cash equivalents. MasTec
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.  MasTec  has not  experienced  any  loss  to  date  on  these
investments.  At  December  31,  1998,  MasTec had cash and cash  equivalent  in
Brazilian reais of approximately $9.1 million.

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

     Property  and  equipment.  Property  and  equipment  are  recorded at cost.
Depreciation and amortization are computed using the  straight-line  method over
the estimated useful lives of the respective assets.  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.

     Intangibles and other long lived assets. Assets and liabilities acquired in
connection  with business  combinations  accounted for under the purchase method

                                       28


are recorded at their respective estimated fair values.  Goodwill represents the
excess  of the  purchase  price  over the  estimated  fair  value of net  assets
acquired,  including  the  recognition  of  applicable  deferred  taxes,  and is
amortized  on a  straight-line  basis over a period  ranging from 5 to 40 years,
with a weighted  average  amortization  period of 22 years. At December 31, 1997
and 1998, MasTec had recorded  intangibles,  primarily consisting of goodwill of
$99.9 million and $142.2 million,  respectively (net of accumulated amortization
of $3.5 million in 1997 and $14.9 million in 1998).

     MasTec reviews long-lived assets, identifiable intangibles and goodwill and
reserves for impairment  whenever  events or changes in  circumstances  indicate
that  the  carrying  amount  of  the  assets  may  not  be  fully   recoverable.
Recoverability  of assets to be held and used is measured by a comparison of the
carrying amount of the assets to future  undiscounted net cash flows expected to
be generated by the assets.  If such assets are  considered to be impaired,  the
impairment  to be  recognized  is measured  by the amount by which the  carrying
amount of the assets  exceeds  the fair value of the assets or  expected  future
cash flows on an  undiscounted  basis.  Assets to be disposed of are reported at
the lower of the carrying amount or fair value less costs to sell.

     Accrued insurance. MasTec 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.  MasTec  records  income taxes using the liability  method of
accounting for deferred income taxes. Under this method, deferred tax assets and
liabilities  are recognized for the expected future tax consequence of temporary
differences  between the  financial  statement  and income tax bases of MasTec's
assets and  liabilities.  A valuation  allowance is established  when it is more
likely than not that any or all of the deferred tax assets will not be realized.

     Stock based  compensation.  MasTec  adopted  the  disclosure  provision  of
Statement of Financial  Accounting  Standard No. 123, Accounting for Stock Based
Compensation  ("SFAS 123") and retained the intrinsic value method of accounting
for such stock based compensation (see Note 6).

     Fair value of financial instruments. MasTec estimates the fair market value
of financial  instruments  through the use of public market prices,  quotes from
financial institutions and other available information.  Judgment is required in
interpreting data to develop estimates of market value and, accordingly, amounts
are not  necessarily  indicative  of the amounts that MasTec could  realize in a
current market exchange.  MasTec's short-term financial  instruments,  including
cash and cash equivalents,  accounts and notes receivable,  accounts payable and
other liabilities, consist primarily of instruments without extended maturities,
the fair value of which, based on management's estimates, equaled their carrying
values.  Long-term  debt is carried at face  value  less  unamortized  discount,
$199.8 million at December 31, 1998. The fair value of MasTec's Senior Notes was
approximately $195.0 million at December 31, 1998. MasTec 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.

Note 2  -  Acquisitions and Investing Activities

     During  1997  and  1998,   MasTec   completed  11  and  12  North   America
acquisitions,  respectively,  which have been  accounted  for under the purchase
method of  accounting.  Accordingly,  the  results  of  operations  of  acquired
companies have been included in MasTec's consolidated results of operations from
their respective  acquisition  dates.  Contingent  consideration,  to the extent
earned,  will be recorded as additional  goodwill.  If the acquisitions had been
made at the beginning of 1997 or 1998, pro forma results of operations would not
have differed  materially  from actual  results based on historical  performance
prior to their  acquisition  by MasTec.  Acquisitions  made in 1998  were:  M.E.
Hunter,  Inc. of Atlanta,  Georgia, C & S Directional  Boring,  Inc. of Purcell,
Oklahoma, Office Communications Systems, Inc. of Inglewood, California, Phasecom
Systems,  Inc. of Toronto,  Canada,  P&E Electric  Company,  Inc. of  Nashville,
Tennessee,   Lessard-Nyren  Utilities,  Inc.  of  Hugo,  Minnesota,   Electronic
Equipment Analyzers,  Inc. of Raleigh, North Carolina,  Cotton and Taylor of Las
Vegas, Nevada,  Stackhouse,  Inc. of Goldsboro, North Carolina, Martin Telephone
Contractors,  Inc. of Cades, South Carolina, Barkers CATV Construction,  Inc. of
Burleson,  Texas  and  Fiber  and  Cable  Works,  Inc.  of  Roanoke,   Virginia,
telecommunications   infrastructure  and  utility  contractors  with  operations
primarily in the western,  northern and  southeastern  United  States as well as
Canada. Of the total 1998 acquisitions, eight, two and two pertained to external
network   services,   power  and  internal   network   services,   respectively.
Additionally,  MasTec made four international acquisitions of telecommunications
infrastructure  contractors:  CIDE Engenharia Ltda. of Brazil, Acietel Mexicana,
S.A. of Mexico, Artcom Services, Inc. of Puerto Rico ("Artcom") and Proyco Ltda.
of Colombia  ("Proyco").  During 1998, MasTec sold 87% of its Spanish operations
which included Artcom and Proyco.

                                       29


     MasTec entered into agreements with certain senior management  personnel at
two  of its  operating  subsidiaries.  These  senior  managers  have  agreed  to
multi-year    employment    agreements   and   10-year    non-competition    and
non-solicitation  agreements.  Under the definitive agreements,  MasTec paid the
senior managers  compensation in the form of cash and common stock options.  The
cash portion totals  approximately  $33.3 million,  of which approximately $13.3
million was paid in 1998 and  approximately  $20.0 million was paid in the first
quarter  of  1999.  As  a  result  of  these   agreements,   MasTec  recorded  a
non-recurring  compensation charge of approximately $33.8 million (including the
value of vested stock  options) in the fourth quarter of 1998.  Additionally  at
December  31,  1998,  MasTec  had  approximately  $7.1  million  due from  these
employees which was received during February 1999.

     On April 30, 1996,  MasTec purchased from  Telefonica,  100% of the capital
stock of  Sistemas e  Instalaciones  de  Telecomunicacion,  S.A.  ("Sintel"),  a
company engaged in  telecommunications  infrastructure  construction services in
Spain, Argentina, Chile, and Peru. In Argentina, Chile and Peru, MasTec operated
through unconsolidated corporations in which it held a 50% interest. On December
31, 1998, MasTec sold 87% of its Spanish operations to a group of investors. The
investor  group included the chief  executive  officer of Sintel and a member of
its board of directors.  MasTec  received $0.9 million (130.5 million pesetas at
an  exchange  rate of 142  pesetas to the  dollar)  on the date of  closing  and
through  March 31, 1999 has  received  $10.2  million.  Payment  terms are being
re-negotiated not to extend beyond 1999. The sale included the assumption of the
remaining  indebtedness  of MasTec to Telefonica for the purchase of the Spanish
operations of $25.0 million (3.6 billion pesetas).

     On July 31, 1997,  MasTec completed its acquisition of 51% of MasTec Inepar
S/A-Sistemas de  Telecomunicacoes  ("MasTec  Inepar"),  a newly formed Brazilian
telecommunications  infrastructure contractor, for 250,000 of MasTec's shares of
common  stock  and  $29.4  million  in  cash,  of  which  $7.3  million  remains
outstanding.

     Subsequent  to December  31, 1998,  MasTec has signed  letters of intent to
acquire two external  network and one  internal  network  services  contractors,
subject to a number of conditions.

Note 3  - Accounts Receivable

     Accounts receivable are presented net of an allowance for doubtful accounts
of $3.1 million,  $3.1 million,  and $7.3 million at December 31, 1996, 1997 and
1998,  respectively.  MasTec recorded a provision for doubtful  accounts of $1.2
million, $0.7 million and $4.5 million during 1996, 1997 and 1998, respectively.
In addition,  MasTec recorded write-offs of $0.1 million,  $0.7 million and $0.3
million during 1996, 1997 and 1998, 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
$10.2 million and $16.1 million at December 31, 1997 and 1998, respectively.

     Included in accounts  receivable  is unbilled  revenue of $97.5 million and
$83.3 million at December 31, 1997 and 1998, respectively. Such unbilled amounts
represent  work  performed  but not  billable  to  customers  as per  individual
contract  terms,  of which $49.5  million and $45.2 million at December 31, 1997
and 1998, respectively, are related to MasTec's Brazilian operations.

     During 1998, MasTec entered into a financing agreement to provide financing
to a customer.  As of December 31, 1998,  MasTec had $41.8  million  outstanding
under this agreement,  of which approximately $30.0 million and $11.8 million is
reflected in accounts receivable and other current assets, respectively,  in the
accompanying  consolidated  balance  sheet as of December 31, 1998.  MasTec will
terminate the financing agreement as of April 30, 1999.

                                       30


Note 4  -  Property and Equipment

     Property and  equipment  is  comprised of the  following as of December 31,
1997 and 1998 (in thousands):

                                                         Estimated
                                                        Useful Lives
                                    1997        1998     (In Years)
                                 ---------    ---------  ----------
Land .........................   $   8,430    $  10,230
Buildings and improvements ...       9,474       11,291    5 - 20
Machinery and equipment ......      97,727      170,922    3 - 7
Office furniture and equipment       5,810        9,319    3 - 5
                                 ---------    ---------
                                   121,441      201,762
Less-accumulated depreciation      (35,332)     (58,865)
                                 ---------    ---------
                                 $  86,109    $ 142,897
                                 =========    =========
Note 5  -  Debt

     Debt is comprised of the following at December 31, (in thousands):


                                                                      1997        1998
                                                                   ---------    ---------
                                                                          
Revolving Credit Facility, at LIBOR plus 1.50% (6.96%
   at December 31, 1997 and 7.06% at December 31, 1998) ........   $  83,010    $ 106,300
Revolving Credit Facility, at MIBOR plus 0.30 (5.60% at       
   December 31, 1997) ..........................................      10,894         --
Other Spanish bank facilities at interest rates from
   5.65% to 6.75% ..............................................      17,438         --
Other bank facilities at LIBOR plus 1.25% (6.31% at 
   December 31, 1998)...........................................        --          6,206
Notes payable for equipment, at interest rates from 7.5% to 8.5%      
   due in installments through the year 2000 ...................      14,500        6,145
Notes payable for acquisitions, at interest rates from 7% to 8%       
   due in installments  through February 2000 ..................      23,215        3,431
Senior Notes, 7.75% due February 2008 ..........................        --        199,750
                                                                   ---------    ---------

Total debt .....................................................     149,057      321,832
Less current maturities ........................................     (54,562)     (11,143)
                                                                   ---------    ---------

Long-term debt .................................................   $  94,495    $ 310,689
                                                                   =========    =========

 
     In June 1997, MasTec entered into a revolving line of credit agreement with
a group of banks as  amended,  (the  "Credit  Facility").  The  Credit  Facility
provides for  borrowings up to an aggregate  amount of $165.0  million.  Amounts
outstanding  under the revolving  credit  facility  mature on June 9, 2000. Upon
written request by MasTec and at the bank's sole  discretion,  the maturity date
of the Credit  Facility may be extended for  successive  annual  periods up to a
final  maturity  date of June 9,  2002.  MasTec  is  required  to pay an  unused
facility fee ranging from .25% to .50% per annum on the facility, depending upon
certain financial covenants.
 
     The Credit Facility is secured by a pledge of shares of certain of MasTec's
subsidiaries.  Interest  under the Credit  Facility  accrues at rates based,  at
MasTec's  option,  on the  agent  bank's  Base  Rate plus a margin of up to .50%
depending on certain financial covenants or 1% above the overnight federal funds
effective rate, whichever is higher, or its LIBOR Rate (as defined in the Credit
Facility)  plus a margin  of 1.00% to  2.25%,  depending  on  certain  financial
covenants.

     MasTec had  outstanding  $18.7  million in standby  letters of credit as of
December 31, 1998.

     On  January  30,  1998,   MasTec  issued  $200.0   million,   7.75%  senior
subordinated  notes (the "Senior  Notes") due in February 2008 with interest due
semi-annually.  The net proceeds were used primarily for  acquisitions and other
corporate purposes.

                                       31

 
     The  Credit  Facility  and the Senior  Notes  contain  customary  events of
default and covenants which prohibit,  among other things, making investments in
excess of a specified amount,  incurring additional  indebtedness in excess of a
specified  amount,  paying  dividends  in excess of a specified  amount,  making
capital expenditures in excess of a specified amount,  creating liens, prepaying
other indebtedness,  including the Senior Notes, and engaging in certain mergers
or  combinations  without the prior written  consent of the lenders.  The Credit
Facility  also  provides  that  MasTec must  maintain  certain  financial  ratio
coverage, requiring, among other things minimum ratios at the end of each fiscal
quarter of debt to earnings and earnings to interest expense.
  
     At December 31, 1998 debt matures as follows:

        1999                         $        11,143
        2000                                 109,063
        2001                                   1,503
        2002                                     345
        2003                                      28
        Thereafter                           199,750
                                     ----------------
                                     $       321,832
                                     ================

Note 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.  MasTec's  only stock  option  plans  currently in effect is the 1994
Stock  Incentive  Plan (the  "1994  Plan") and the 1994  Stock  Option  Plan for
Non-Employee Directors (the "Directors' Plan"). Under MasTec's 1976 stock option
plan,  there are 5,250 shares available for grant and have been reserved for and
may still be issued in accordance with the terms of such plan.

     The 1994 Plan authorizes the grant of options or awards of restricted stock
up to 2,500,000  shares of MasTec's common stock, of which 500,000 shares may be
awarded as  restricted  stock.  As of  December  31,  1998,  options to purchase
1,567,695 (net of 464,255 stock options cancelled) shares had been granted under
the 1994 Plan. Options are exercisable at prices and over periods established by
the  Compensation  Committee of the Board of Directors  and must be exercised no
later than 10 years from the date of grant.

     The  Directors'  Plan  authorizes  the grant of options to  purchase  up to
600,000 shares of MasTec's common stock to the non-employee  members of MasTec's
Board of  Directors.  Options to purchase  142,500  shares have been  granted to
Board members through 1998. 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 three to 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. In 1997, options to purchase 110,000 shares of
common  stock at fair  market  value on the date of grant  were  granted  to two
executive  officers  outside the 1994 plan.

     In  connection  with two  acquisitions  completed  during 1997,  options to
purchase  800,000 shares of MasTec's  common stock at prices ranging from $17.50
to $20.19 were granted to individuals  during 1998 outside the 1994 Plan subject
to varying vesting schedules.

                                       32


     The following is a summary of all stock option transactions:



                                                                                                                Weighted
                                                                                                              Average Fair
                                                        Weighted                                                Value of
                                          Stock          Average                                                 Options
                                         Options       Exercise Price               Exercise Price               Granted
                                    ----------------  ---------------  -------------------------------------- --------------
                                                                                               
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            0.10        -         28.58
Granted                                  1,254,950          24.96           21.09        -         48.19      $ 19.97
Exercised                                 (201,950)          5.58            0.10        -         21.83
Canceled                                  (343,475)         23.62            5.29        -         48.19
                                    ----------------  ---------------  --------------------------------------

Outstanding December 31, 1997            1,607,425          17.06            0.10        -         31.63
Granted                                  1,234,250          19.17           12.97        -         31.88      $ 13.29
Exercised                                 (101,990)         11.38            1.33        -         21.09
Canceled                                  (110,580)         19.47            5.29        -         31.63
                                    ================  ===============  ======================================
Outstanding December 31, 1998            2,629,105    $     18.32      $     0.10        -     $   31.88
                                    ================  ===============  ======================================


     The following table summarizes  information about stock options outstanding
at December 31, 1998:




                                        Stock Options Outstanding                             Options Exercisable
                       ------------------------------------------------------------  ---------------------------------------
 
 Range of Exercise      Number of Stock    Weighted              Weighted Average     Number of Stock     Weighted Average
       Prices               Options        Average                   Exercise             Options             Exercise
  
                                                Remaining              Price                                   Price
                                            Contractual Life
- ---------------------  ------------------  --------------------  ------------------  ------------------  -------------------
                                                                                            
    .10 - .10                   3,600              4.50          $      0.10                  3,600      $      0.10
   3.83 - 5.29                 94,200              5.19                 4.83                 35,700             5.29
   6.83 - 9.81                327,430              6.41                 8.66                181,330             8.73
  12.97 - 17.50               532,500              9.98                17.34                166,667            17.50
  20.19 - 31.88             1,671,375              8.62                21.32                674,911            21.09
                       ==================  ====================  ==================  ==================  ===================
                            2,629,105              8.49          $     18.32              1,062,208      $     17.82
                       ==================  ====================  ==================  ==================  ===================

 
     MasTec  has  reflected  below  the  1996,  1997  and  1998  earnings  as if
compensation  expense relative to the fair value of the options granted had been
recorded  under the  provisions  of SFAS No. 123  "Accounting  for Stock-  Based
Compensation."  The fair  value of each  option  grant was  estimated  using the
BlackScholes option-pricing model with the following assumptions used for grants
in 1996,  1997 and 1998,  respectively:  a five, six and five year expected life
for 1996, 1997 and 1998,  respectively;  volatility factors of 57%, 82% and 72%,
respectively; risk-free interest rates of 6.1%, 5.5% and 4.3%, respectively; and
no dividend payments.

                                       33


     Had  compensation  cost for  MasTec's  options  plans been  determined  and
recorded in accordance  with SFAS No. 123,  MasTec's net income and earnings per
share would have been reduced to the pro forma amounts as follows:

                                          1996       1997        1998
                                       ---------  ---------   ---------
Net income (loss):
As reported ........................   $ 30,065   $ 34,664    $(13,915)
                                       =========  =========   =========
Pro forma ..........................   $ 29,211   $ 28,797    $(28,472)
                                       =========  =========   =========

Basic earnings (loss) per share:
As reported ........................   $   1.22   $   1.31    $  (0.51)
Pro forma ..........................   $   1.18   $   1.09    $  (1.04)

Diluted earnings (loss) per share:
As reported ........................   $   1.20   $   1.28    $  (0.51)
Pro forma ..........................   $   1.16   $   1.07    $  (1.04)

 
     The  1996,  1997 and 1998 pro  forma  effect  on net  income  (loss) 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 given that the options are considered  incentive  stock options and such
benefit, if any, cannot be presently determined.
  
Note 7  -  Income Taxes

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

                                1996        1997      1998
                             --------    --------   --------
Current:
  Federal ................   $ 10,891    $  9,583   $  3,198
  Foreign ................      5,347       4,465      1,376
  State and local ........      1,536       1,670      1,002
                             --------    --------   --------
                               17,774      15,718      5,576
                             --------    --------   --------

Deferred:
  Federal ................     (1,965)      2,730      2,119
  Foreign ................       --         2,040      5,430
  State and local ........       (218)        456       (575)
                             --------    --------   --------
                               (2,183)      5,226      6,974
                             --------    --------   --------
Provision for income taxes   $ 15,591    $ 20,944   $ 12,550
                             ========    ========   ========

                                       34


     The tax effects of significant  items comprising  MasTec's net deferred tax
liability as of December 31, 1997 and 1998 are as follows (in thousands):

                                                    1997       1998
                                                  --------    --------
Deferred tax assets:
    Non-compete ...............................   $   --      $  5,951
    Bad debts .................................      1,104       5,680
    Accrued self insurance ....................      2,100       4,566
    Operating loss and tax credit carry forward      1,565       1,186
    All other .................................      6,446       6,603
                                                  --------    --------
Total deferred tax assets .....................     11,215      23,986
                                                  --------    --------

Deferred tax liabilities:
    Installment sale ..........................       --         6,271
    Accounts receivable retainage .............      3,866       6,973
    Property and equipment ....................      7,536       9,208
    Asset re-evaluations ......................      6,066       5,677
    All other .................................          5       3,420
                                                  --------    --------
Total deferred tax liabilities ................     17,473      31,549
    Valuation allowance .......................      1,376         211
                                                  --------    --------
Net deferred tax liability ....................   $ (7,634)   $ (7,774)
                                                  ========    ========

     The net deferred tax  liability  includes  deferred  items  resulting  from
acquisitions  made  during the  period  which are not  reflected  as part of the
deferred tax  provision.  Deferred tax assets of $1.2 million for 1997 have been
recorded  in  current  assets  in  the   accompanying   consolidated   financial
statements.  The net change in the  valuation  allowance for deferred tax assets
was a decrease of $1.2 million.

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

                                                  l996       1997      1998
                                                 ------     ------    ------
     U.S. statutory federal rate
        applied to pretax income ............       35%        35%       35%
     State and local income taxes ...........        2          2        10
     Effect of non-U.S. tax rates ...........       (1)        (1)      (23)
     Amortization of intangibles ............       --         --        58
     Gain on sale of Spanish operations .....       --         --       329
     Non-deductible expenses ................       --         --        37
     Other ..................................        1          1        33
                                                 ======     ======    ======
     Provision for income taxes .............       37%        37%      479%
                                                 ======     ======    ======

     No provision  have been made for the years ended December 31, 1997 and 1998
for U.S. income taxes on the undistributed  earnings of the foreign subsidiaries
since  it is  MasTec's  intention  to  utilize  those  earnings  in the  foreign
operations  for an  indefinite  period of time.  During  1998,  MasTec  sold its
interest in its Spanish  operations  which  resulted in a tax  liability of $7.8
million. At December 31, 1998,  undistributed  earnings of the remaining foreign
subsidiaries  amounted  to  $11.8  million.  If the  earnings  of  such  foreign
subsidiaries were not indefinitely  reinvested, a deferred tax liability of $0.2
million would be required.

     The Internal Revenue Service (the "IRS") examined the tax returns for
the fiscal years ended April 30, 1989 through April 30, 1993.  During 1998,  the
IRS  concluded  its  examination  which  resulted in a payment of  approximately
$150,000. The IRS is currently reviewing the tax returns filed by MasTec for the
years ended  December 31, 1995 and 1996.  No  adjustments  have been proposed to
date related to this review.

                                       35


Note 8  -  Capital Stock

     MasTec has authorized  100,000,000 shares of common stock, $0.10 par value.
At December 31, 1997 and 1998, approximately 28,056,000 and 27,382,000 shares of
common stock were issued,  27,580,000  and  27,382,000  shares were  outstanding
(adjusted  for the stock  split),  respectively,  and 476,000 and 0 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, 1997 and 1998,
MasTec had 5,000,000 shares of authorized but unissued preferred stock.

Note 9  -  Operations by geographic areas and segments

     MasTec  derives  a  substantial  portion  of  its  revenue  from  providing
telecommunications   infrastructure   services  to  Telefonica,   BellSouth  and
Telebras.  For the year ended  December 31, 1996,  approximately  31% and 13% of
MasTec's  revenue  was  derived  from  services  performed  for  Telefonica  and
BellSouth,  respectively.  For the year ended  December 31, 1997,  approximately
27%, 13% and 11% of MasTec's  revenue was derived from  services  performed  for
Telefonica,  BellSouth and Telebras,  respectively.  For the year ended December
31,  1998,  approximately  19%, 7% and 8% of MasTec's  revenue was derived  from
services performed for Telefonica, BellSouth and Telebras, respectively. For the
year ended December 31, 1997,  revenue  generated from Telebras is included from
August 1, 1997 (See Note 2).  For the year  ended  December  31,  1998,  revenue
generated  from Telebras is included from January 1, 1998 through July 31, 1998,
subsequent  to that period  Telebras was  privatized  and divided into more than
eight  unaffiliated  companies owned by private investors.  Accounts  receivable
from MasTec's three largest  customers  approximated  $192.0 million at December
31, 1997.

     External Network Services. MasTec's principal domestic business consists of
external network services for telecommunications providers,  including incumbent
and  competitive   local  exchange   carriers,   cable   television   operators,
long-distance carriers and wireless communications  providers.  External network
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 headed 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. MasTec 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.  Services to many of these
customers are provided under exclusive master contracts with 2 to 3 year initial
terms expiring at various dates.

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

     Internal  Network  Services.  MasTec  provides  design,   installation  and
maintenance of internal networks linking the customers'  voice,  video, data and
internet computer and communications networks at multiple locations. MasTec also
provides   systems   integration   services,   which   involve  the   selection,
configuration,   installation  and  maintenance  of  software,  hardware,  other
computing  and  communications  equipment  and cabling to provide an  integrated
computing and communications  system.  Internal network services is less capital
intensive than external  network  construction  but requires a more  technically
proficient  work  force.   MasTec  provides  these  services  to  its  customers
nationwide, primarily on the east and west coasts of the United States.

     Internal network 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 external network  construction;  both
involve  the placing and  splicing  of copper,  coaxial and fiber optic  cables.
Inside wiring is less capital  intensive than external network  construction but
requires a more technically proficient work force. MasTec contracts with primary
contractors to provide  services under  subcontracts  that are similar to master
contracts  in the  external  network  business.  MasTec also  provides  internal
network  services on individual  projects that are awarded on a competitive  bid
basis or through individual negotiation.

                                       36


     External Network Power.  MasTec provides external network services to power
companies,  including  investor-owned  utilities and rural  cooperatives.  These
services,  which are  substantially  similar to the  external  network  services
provided to  telecommunications  companies,  include  overhead  and  underground
construction and maintenance of electrical and other utilities  transmission and
distribution  networks,  substation  construction and maintenance,  right-of-way
maintenance  and  restoration of asphalt and concrete  surfaces.  The work often
involves  the  installation  and  splicing  of  high-voltage   transmission  and
distribution  lines.  Services to many of these  customers  are  provided  under
exclusive  master  contracts  with 2 to 3 year initial terms expiring at various
dates,  as well as on a project  by  project  basis  awarded  under  competitive
bidding and  individual  negotiations.  MasTec  currently has 42 master  service
agreements with power companies.

     The following  table set forth,  for each of 1996,  1997 and 1998,  certain
information   about  segment  results  of  operations  and  segment  assets  (in
thousands).


           1996            External  Internal  External     
                           Network   Network   Network    Inter-
                           Services  Services   Power    national   Other(1) Consolidated
- -----------------------------------------------------------------------------------------
                                                           
Revenue ...............    $219,559    35,524     3,773   188,155    25,789  $  472,800
                           ========  ========  ========  ========  ========  ==========
Operating income (loss)      35,838     4,303       566    19,733   (10,498)     49,942
Depreciation and 
   amortization .......       8,718       484       522     2,058       218      12,000  
Total assets ..........     105,333    16,140     2,890   259,624    99,031     483,018
Capital Expenditures ..       3,714       689       320      --       2,336       7,059

           1997            External  Internal  External     
                           Network   Network   Network    Inter-
                           Services  Services   Power    national   Other(1) Consolidated
- -----------------------------------------------------------------------------------------

Revenue ...............    $281,426    47,285    19,693   282,393    28,642  $  659,439
                           ========  ========  ========  ========  ========  ==========
Operating income (loss)      39,888     3,565       607    21,450    (8,019)     57,483
Depreciation and 
   amortization .......      15,686     1,022     2,888     3,403       856      23,855
Total assets ..........     154,074    36,167    33,805   250,277   155,901     630,224
Capital Expenditures ..      16,387     1,113     1,223     1,879       932      21,534

           1998            External  Internal  External     
                           Network   Network   Network    Inter-
                           Services  Services   Power    national   Other(1) Consolidated
- -----------------------------------------------------------------------------------------

Revenue ...............    $455,798    89,687   120,218   379,294     3,925  $1,048,922
                           ========  ========  ========  ========  ========  ==========
Operating income (loss)      58,974    (3,411)   10,910    15,167   (53,380)     28,260
Depreciation and 
    amortization ......      24,600     1,617    10,095     6,029       972      43,313
Total assets ..........     303,088    60,659    86,809    88,612   196,318     735,486
Capital Expenditures ..      41,946     2,361    25,872     5,003     1,263      76,445


     (1)  Consists of non-core construction and corporate operations.

                                       37


     There are no significant  transfers between  geographic areas and segments.
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. Operating income
is net of corporate general and administrative  expenses. Total assets are those
assets used in MasTec's  operations in each segment.  Corporate  assets  include
cash and cash equivalents,  investments in unconsolidated companies, assets held
for sale and notes receivable.

Note 10  -  Commitments and Contingencies

     In  December  1990,  Albert H.  Kahn,  a  stockholder  of  MasTec,  filed a
purported  class  action and  derivative  suit in Delaware  state court  against
MasTec,  the  then-members  of its Board of  Directors,  and  National  Beverage
Corporation ("NBC"), MasTec's then-largest  stockholder.  The complaint alleges,
among other  things,  that MasTec'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  MasTec,  the then members of its Board of Directors,  and Jorge L. Mas,
Jorge Mas and Juan Carlos Mas, the principal  shareholders  of MasTec.  The 1993
lawsuit  alleges,  among other things,  that MasTec's Board of Directors and NBC
breached  their  respective  fiduciary  duties  by  approving  the  terms of the
acquisition  of MasTec by the Mas family,  and that the Mas family had knowledge
of the  fiduciary  duties  owed by NBC  and  MasTec's  Board  of  Directors  and
knowingly and  substantially  participated  in the breach of these  duties.  The
lawsuit also claims derivatively that each member of MasTec's Board of Directors
engaged in  mismanagement,  waste and  breach of  fiduciary  duties in  managing
MasTec's affairs prior to the acquisition by the Mas Family.

     There has been no  activity  in either of these  lawsuits  in more than two
years.  MasTec believes that the allegations in each of the lawsuits are without
merit and intends to defend these lawsuits vigorously.

     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 MasTec seeking damages.  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.  MasTec  is  vigorously  pursuing  this
lawsuit.

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

     Federal,  state and local laws and regulations govern MasTec's operation of
underground fuel storage tanks. MasTec 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.  The
cost of these cleanups is not expected to be material.

     In connection with certain contracts,  MasTec has signed certain agreements
of indemnity in the aggregate amount of approximately  $194.4 million,  of which
approximately  $145.3 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.

     During 1998,  MasTec  provided a customer  financing in connection with the
sale of its  services.  As of  December  31,  1998,  MasTec  had  $41.8  million
outstanding  under this agreement.  MasTec  anticipates  that it will provide an
additional $8.0 million of financing under this agreement. MasTec will terminate
financing  agreement as of April 30, 1999.  MasTec has entered into an agreement
to expand the telephone network of the Nicaraguan  telephone company.  MasTec is
not currently  rendering  construction  services in Nicaragua and has determined
not to proceed  with the project  unless  MasTec  obtains  non-recourse  outside
financing.

                                       38


     MasTec has  committed to continue  developing  a PCS cellular  phone system
through its investment in Paraguay.  MasTec anticipates investing  approximately
$13.0 million for the development of this system over the next 12 months. MasTec
will terminate financing agreement as of April 30, 1999.

     MasTec announced a stock repurchase program in April 1998. Through December
31, 1998,  MasTec had purchased a total of 667,000 shares at an average price of
$20.58.  MasTec may  continue to purchase  shares from time to time.  The Credit
Facility  restricts  the amount of shares  that MasTec may  repurchase  up to an
additional amount of $5.5 million (see Note 5).

     MasTec'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.
MasTec  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
MasTec's international operations.

Note 11  - Assets Held for Sale

     In previous years,  MasTec has recorded a charge of $23.1 million to adjust
the carrying  values of its real estate  investment to estimated net  realizable
value  based on offers  received  by MasTec to dispose of  certain  real  estate
investments  in a bulk  transaction.  Included  in  assets  held for sale in the
accompanying  balance  sheet is  approximately  $10.5  million of real estate at
December 31, 1998. MasTec is actively  marketing this real estate and expects to
dispose of substantially all these assets in 1999.

     MasTec  has  a  28%   voting   interest   in   Supercanal   Holding,   S.A.
("Supercanal"),  a  holding  company  of  numerous  cable  television  operators
predominately in Argentina.  MasTec does not exercise significant influence over
the management of Supercanal. During 1998, MasTec contributed an additional $1.7
million. Based on the most recent available financial information,  for the nine
months ended  September 30, 1998,  Supercanal  incurred  losses of $53.0 million
(unaudited)   and   reflected  a   shareholders'   deficiency  of  $5.0  million
(unaudited).

     In  July  1995,   MasTec  made  a  $25  million   non-recourse   term  loan
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,  MasTec converted its loan and accrued interest into the stock of the
holding  company.  In December  1997,  MasTec sold its investment in the holding
company for $20.0 million in cash and 7.5 million shares of Conecel common stock
valued at $25.0 million.  Accordingly,  MasTec recognized a gain of $4.4 million
net of tax based of the percent of cash received to the total transaction value.

     During January 1999,  MasTec engaged  investment  bankers to dispose of its
investments  in Supercanal  and Conecel which have a carrying  value at December
31, 1998 of $33.9 million. MasTec also has other international  investments with
a carrying value of $5.6 million recorded as assets held for sale as of December
31, 1998.  MasTec estimates that the carrying value of such assets held for sale
will be realized upon their ultimate disposition.

                                       39


Note 12 -  Quarterly Information (Unaudited)

     The following table presents unaudited  quarterly operating results for the
two  years  ended  December  31,  1998.   MasTec  believes  that  all  necessary
adjustments have been included in the amounts stated below to present fairly the
quarterly  results  when read in  conjunction  with the  Consolidated  Financial
Statements  and Notes  thereto for the years ended  December  31, 1997 and 1998.
Results of operations for any particular quarter are not necessarily  indicative
of  results  of  operations  for a full year or  predictive  of future  periods.
Quarterly  results  have been  adjusted to reflect the  application  of purchase
accounting to acquisitions previously accounted for as pooling of interests (see
Note 1).


                                             1997                                      1998
                                         Quarter Ended                             Quarter Ended
                             --------------------------------------------------------------------------------
                              Mar 31    Jun 30    Sep 30    Dec 31      Mar 31    Jun 30    Sep 30    Dec 31
                             --------  --------  --------  --------   ---------  --------  --------  --------
                                                   (in thousands, except per share data)
                                                                             
Statement of Income Data
Revenue .................... $130,143  $141,499  $184,562  $203,235    $186,095  $246,106  $288,606  $328,115
Gross profit, excluding 
   depreciation and
   amortization ............   36,928    39,675    41,688    44,918      33,129    59,878  $ 70,093    82,710
Operating income (loss) ....   15,495    17,614    16,772     7,602     (13,599)   20,011    26,289    (4,441)
Net income (loss) ..........    9,287    10,826     8,498     6,053     (12,099)    9,395    13,413   (24,624)
Basic earnings (loss) per .. $   0.36  $   0.42  $   0.32  $   0.22    $  (0.44) $   0.34  $   0.49  $  (0.90)
   share
Diluted earnings (loss) .... $   0.36  $   0.41  $   0.31  $   0.22    $  (0.44) $   0.33  $   0.48  $  (0.90)
   per share



     MasTec  believes  that the effects of inflation  have not had a significant
impact on its results of operations or financial condition.  MasTec's results of
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.

     During the third quarter of 1997,  MasTec  commenced  operations in Brazil,
through its subsidiary MasTec Inepar.

     During the fourth  quarter of 1997,  MasTec sold at a gain of $4.4  million
net of taxes, a portion of Conecel.

         First quarter of 1998 was negatively affected by severe weather, a $4.0
million  related to charges  incurred  in North  American  operations  and $13.4
million of severance expenses related to MasTec's Spanish operations.

 
     During the fourth  quarter of 1998,  MasTec sold at a loss of $9.2  million
($17.0 million net of taxes) 87% of its Spanish operations.

     During  the  fourth  quarter  of  1998,  MasTec  recorded  a $33.8  million
compensation  charge for senior  management at certain  operating  subsidiaries,
$4.5 million for losses on a non-core  contract,  $1.4 million for startup costs
and $500,000 associated with bad debts reserves.



                             * * * * * * * * * * * *


                                       40


                  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS
                     ON ACCOUNTING AND FINANCIAL DISCLOSURE

         None.

               DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     Information  regarding  MasTec's  executive  officers  is  included in this
Annual  Report  under  the  caption  "Executive  Officers  of  the  Registrant."
Information  regarding  MasTec's  directors and nominees for  directors  will be
contained in MasTec's  Proxy  statement  relating to the 1999 Annual  Meeting of
Shareholders  to be  held  on May  25,  1999  (the  "Proxy  Statement"),  and is
incorporated in this Annual Report by reference.

                             EXECUTIVE COMPENSATION

     Information  regarding  compensation of MasTec's executive officers will be
contained in the Proxy  Statement and is  incorporated  in this Annual Report by
reference,  except  the  Compensation  Committee  Report and  Performance  Graph
contained  in the Proxy  Statement,  which are not  incorporated  in this Annual
Report by reference.

         SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     Information  regarding  the  ownership  of  MasTec's  Common  Stock will be
contained in the Proxy  Statement and is  incorporated  in this Annual Report by
reference.

                 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     Information  regarding certain  relationships and related transactions will
be contained in the Proxy Statement and is incorporated in this Annual Report by
reference.

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

(a)  1.   Financial  Statements - The financial statements and the reports of
          Independent Accountants are listed on page 18 and included on pages 19
          through 41.

     2.   Financial  Statements  Schedules - The  financial  statement  schedule
          information required by Item 14(a)(2) is included as part of "Note 3 -
          Accounts   Receivable"   of  the  Notes  to   Consolidated   Financial
          Statements.

     3.   Exhibits including those incorporated by reference:

Exhibit
   No.    Description

     1.1  Articles of Incorporation,  filed as Appendix B to MasTec's definitive
          Proxy  Statement  for its 1998 Annual  Meeting of  Stockholders  dated
          April 14, 1998 and filed with the Securities  and Exchange  Commission
          on April 14, 1998, and incorporated by reference herein.

     1.2  By-laws,  filed as Exhibit 3.2 to MasTec's Form 8-K dated May 29, 1998
          and filed with the  Commission on June 26, 1998, and  incorporated  by
          reference herein.

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

                                       41


     10.1 Stock Option  Agreement dated March 11, 1994 between MasTec and Arthur
          B. Laffer,  filed as Exhibit  10.6 to MasTec'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  MasTec and
          Henry N. Adorno,  filed as Exhibit 10.2 to MasTec's  Form 10-K for the
          year ended December 31,1997 and incorporated by reference herein.

     10.3 Stock Option  Agreement  dated  December  29, 1997 between  MasTec and
          Joel-Tomas Citron, filed as Exhibit 10.3 to MasTec's Form 10-K for the
          year ended December 31, 1997 and incorporated by reference herein.

     10.4 Revolving  Credit  Agreement  dated as of June 9, 1997 between MasTec,
          certain  of its  subsidiaries,  and BankBoston,  N.A.  as agent.

     10.5 Agreement dated July 21, 1997 between MasTec and Inepar S/A Industrias
          e  Construcoes,  filed as Exhibit  10.5 to MasTec's  Form 10-K for the
          year ended December 31, 1997 and incorporated by reference herein.

     10.6 First Amendment to Revolving Credit  Agreement,  filed as Exhibit 10.1
          to MasTec's  Quarterly  Report on Form 10-Q for the quarter ended June
          30, 1998 and incorporated by reference herein.

     10.7 Second,  Third,  Fourth  and  Fifth  Amendments  to  Revolving  Credit
          Agreement.

     10.8 Agreement  between  Joel-Tomas  Citron and MasTec dated as of November
          18, 1998.

     10.9 Stock  purchase  and sale  agreement  dated as of  December  31,  1998
          between MasTec and a group of investors regarding the sale of MasTec's
          Spanish operations.

     21.1 Subsidiaries of MasTec.

     23.1 Consent of Arthur Andersen LLP

     23.2 Consent of PricewaterhouseCoopers LLP

     27.1 Financial Data Schedule

     99.1 Cautionary  Statements Regarding Safe Harbor Provisions of the Private
          Securities Litigation Reform Act of 1995

     (b)  Reports on Form 8-K:

          On January 14, 1999,  MasTec filed a Current  Report on Form 8-K dated
     December 31, 1998 with the  Securities  and Exchange  Commission  reporting
     information under Item 2, Acquisition or Disposition of Assets.

                                       42





                                   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, in the City of Miami,
State of Florida, on March 29, 1999.

                                  MASTEC, INC.

                                  /S/ CARMEN M. SABATER
                                  --------------------------------------------
                                  Carmen M. Sabater
                                  Senior Vice President - Director of Finance
                                  (Principal Financial Officer)

                                  /S/ ARLENE VARGAS
                                  --------------------------------------------
                                  Arlene Vargas
                                  Vice President and Controller
                                  (Principal Accounting Officer)


                                POWER OF ATTORNEY

     The undersigned  directors and officers of MasTec,  Inc. hereby  constitute
and appoint  Carmen M. Sabater and Jose 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 29, 1999.


/S/ JORGE MAS
- --------------------------------------
Jorge Mas, Chairman of the Board,
President and Chief Executive Officer
(Principal Executive Officer)


/S/ ELIOT C. ABBOTT
- --------------------------------------
Eliot C. Abbott, Director


/S/ ARTHUR B. LAFFER
- --------------------------------------
Arthur B. Laffer, Director


/S/ JOSE S. SORZANO
- --------------------------------------
Jose S. Sorzano, Director


/S/ JOEL-TOMAS CITRON
- --------------------------------------
Joel-Tomas Citron, Director

                                       43



                                  MasTec, Inc.
                                 Exhibit Index

Exhibit
   No.    Description

     1.1  Articles of Incorporation,  filed as Appendix B to MasTec's definitive
          Proxy  Statement  for its 1998 Annual  Meeting of  Stockholders  dated
          April 14, 1998 and filed with the Securities  and Exchange  Commission
          on April 14, 1998, and incorporated by reference herein.

     1.2  By-laws,  filed as Exhibit 3.2 to MasTec's Form 8-K dated May 29, 1998
          and filed with the  Commission on June 26, 1998, and  incorporated  by
          reference herein.

     4.1  7 3/4%  Senior  Subordinated  Notes  Due  2008  Indenture  dated as of
          February  4,  1998,  filed as  Exhibit  4.2 to  MasTec'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 MasTec and Arthur
          B. Laffer,  filed as Exhibit  10.6 to MasTec'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  MasTec and
          Henry N. Adorno,  filed as Exhibit 10.2 to MasTec's  Form 10-K for the
          year ended December 31,1997 and incorporated by reference herein.

     10.3 Stock Option  Agreement  dated  December  29, 1997 between  MasTec and
          Joel-Tomas Citron, filed as Exhibit 10.3 to MasTec's Form 10-K for the
          year ended December 31, 1997 and incorporated by reference herein.

     10.4 Revolving  Credit  Agreement  dated as of June 9, 1997 between MasTec,
          certain  of its  subsidiaries,  and BankBoston,  N.A.  as agent.

     10.5 Agreement dated July 21, 1997 between MasTec and Inepar S/A Industrias
          e  Construcoes,  filed as Exhibit  10.5 to MasTec's  Form 10-K for the
          year ended December 31, 1997 and incorporated by reference herein.

     10.6 First Amendment to Revolving Credit  Agreement,  filed as Exhibit 10.1
          to MasTec's  Quarterly  Report on Form 10-Q for the quarter ended June
          30, 1998 and incorporated by reference herein.

     10.7 Second,  Third,  Fourth  and  Fifth  Amendments  to  Revolving  Credit
          Agreement.

     10.8 Agreement  between  Joel-Tomas  Citron and MasTec dated as of November
          18, 1998.

     10.9 Stock  purchase  and sale  agreement  dated as of  December  31,  1998
          between MasTec and a group of investors regarding the sale of MasTec's
          Spanish operations.

     21.1 Subsidiaries of MasTec.

     23.1 Consent of Arthur Andersen LLP

     23.2 Consent of PricewaterhouseCoopers LLP

     27.1 Financial Data Schedule

     99.1 Cautionary  Statements Regarding Safe Harbor Provisions of the Private
          Securities Litigation Reform Act of 1995