Exhibit 10.3


                       NONINCENTIVE STOCK OPTION AGREEMENT

                  A  Nonincentive  Stock Option (the "Option") is hereby granted
by MASTEC,  INC., a Delaware  corporation (the "Company"),  to JOEL-TOMAS CITRON
("Optionee"),  for and with respect to common  stock of the  Company,  par value
$.10 per  share  (the  "Common  Stock"),  subject  to the  following  terms  and
conditions:

                  1.     Option Grant.  Subject to the  provisions set forth 
herein, and in  consideration of the agreements of the Optionee herein provided,
the Company hereby grants to the Optionee an Option to purchase from the Company
the number of shares of Common Stock, at the purchase  price per share, and on 
the schedule, all as set forth below.  This  Option  shall not be treated as an
incentive stock option as defined in Section  422A(b) of the  Internal  Revenue
Code of 1986, as amended.

Number of Shares
Subject to Option:   10,000

Option Price Per Share:    $21.0938

Date of Grant:   December 29, 1997

Exercise Schedule:

             Number of Shares       Commencement      Expiration
            Subject to Option            Date            Date
            -----------------       ------------         ----
                  3,334             Dec. 29, 1998    Dec. 29, 2007
                  3,333             Dec. 29, 1999    Dec. 29, 2007
                  3,333             Dec. 29, 2000    Dec. 29, 2007

                  2.       General Terms and Conditions of Option.

                  (a)    The Option shall be subject to the following 
                         restrictions on exercise:

                           i. The Option shall not be  immediately  exercisable.
                  The  Option  shall  not be  exercisable,  in whole or in part,
                  prior to the expiration of one (1) year from the date of grant
                  except  in the  event of the  Optionee's  death,  or after the
                  expiration  of ten years from the date the Option was granted.
                  In  no  event  may  the  Option  be  exercised  prior  to  the
                  expiration  of six (6) months  from the date of grant.  To the
                  extent that the Option is not  exercised  within the  ten-year
                  period  of  exercisability,  it  shall  expire  as to the then
                  unexercised part.

                           ii. The Option shall not be exercisable  with respect
                  to a fractional share or with respect to the lesser of fifty 
                  (50) shares or the full number of shares then subject to the
                  Option.

                          iii. Except as provided in Section 3, the Option shall
                  not be exercisable in whole or in part unless the Optionee, at
                  the time the Optionee exercises the Option, is, and has been 
                  at all times since the date of grant of the Option, a director
                  of the Company.

                  (b)    Written  notice of an election to exercise  any portion
of the Option, specifying  the portion thereof being exercised and the exercised
date,  shall be given by the Optionee, or his personal representative  in the 
event of the Optionee's death, (i) by delivering such notice at the principal
executive  offices of the Company no later than the  exercise  date, or (ii) by 
mailing such notice, postage prepaid, addressed to the Secretary of the Company 
at the principal executive offices of the Company at least three business days
prior to the exercise date.

                  (c)    The Option may be exercised only by making payment in 
full for the shares of Common Stock being acquired thereunder at the time of 
exercise (including applicable withholding taxes, if any) by check or bank 
draft, or by tendering  to the Company Common Stock shares already  owned by the
person exercising the Option, which may include shares received as the result of
a prior exercise of the Option, and having a fair market value equal to the cash
exercise price applicable to such Option, or by tendering a combination of cash
and Common Stock shares as aforesaid.

                  (d)    In the event the Option shall be exercised in whole, 
this agreement shall be surrendered to the Company for cancellation.  In the 
event the Option shall be exercised in part, or a change in the number or 
designation of the Common Stock shall be made, this agreement shall be delivered
by the Optionee to the Company for the purpose of making appropriate notation 
thereon, or of otherwise reflecting, in such manner as the Company shall 
determine, the partial exercise or the change in the number or designation of 
the Common Stock.

                   3.      Termination  of  Service.  The  Option  shall  
terminate upon the termination, for any reason, of the Optionee's directorship 
with the Company, and no shares may thereafter be purchased under such Option,
except as follows:

                  (a)      Upon  retirement  as a director  of the  Company  
                  after at least six years of service,  the  unexpired  part of 
                  the Option held by the Optionee shall, to the extent otherwise
                  exercisable on such date, remain exercisable, in whole or in 
                  part, for a period of three (3) years following such 
                  retirement.

                  (b)      Upon termination of service as a director of the 
                  Company by reason of death or disability, the unexpired part
                  of the Option held by the Optionee, or in the case of death, 
                  the Optionee's executors, administrators, heirs or 
                  distributors, as the case may be, shall become immediately 
                  exercisable and shall remain exercisable, in whole or in part,
                  for a period of three (3) years after such termination.  
                  Disability  shall  mean an  inability  as  determined by the 
                  Board of Directors of the Company ("Board") to perform duties 
                  and services as a director of the Company by reason of a 
                  medically determinable physical or mental impairment, 
                  supported  by  medical evidence, which can be expected to last
                  for a continuous  period  of not  less  than six (6) months.

                  In the  event  the  Option  is  exercised  by  the  executors,
administrators,  heirs or distributees  of the estate of the deceased  Optionee,
the Company shall be under no obligation to issue Common Stock thereunder unless
and until the Company is  satisfied  that the person or persons  exercising  the
Option are the duly appointed legal  representative  of the deceased  Optionee's
estate or the proper legatees or distributees thereof.

                  In no event, however, may the Option be exercised (i) prior to
the  expiration  of six  months  from the date of grant,  or (ii) after ten (10)
years from the date it was granted.

                  4.       Change in Control. (a) Subject to the limitations set
forth in the last paragraph, in the event of a change in control of the Company,
(i) the Option shall immediately become exercisable in full, and (ii) the 
Optionee shall have the right  within one (1) year after such event to exercise 
the Option in full.

                  (b)      For  purposes  of this  Section 4, a "change  in  
                  control" shall be deemed to have occurred if at any time on 
                  or after the date hereof:

                           i.       there shall be consummated:

                                    (1)  any  consolidation  or  merger  of  the
                           Company  in  which the  Company is not the continuing
                           or  surviving   corporation   or   pursuant to which 
                           any shares of Common Stock are to be converted into 
                           cash, securities or other property, provided that the
                           consolidation   or   merger   is   not  with   a
                           corporation  which was a  wholly-owned subsidiary of 
                           the Company immediately before the consolidation or 
                           merger; or

                                    (2)  any  sale,  lease,  exchange  or  other
                                    transfer (in one  transaction or a series of
                                    related    transactions)    of    all,    or
                                    substantially  all,  of  the  assets  of the
                                    Company; or

                           ii.      the  shareholders  of  the  Company  approve
                           any  plan  or  proposal  for  the liquidation or 
                           dissolution of the Company; or

                           iii.     any "person,"  including a "group" as 
                           determined in accordance with  Sections 13(d) and 14
                           (d) of the Securities Exchange Act of 1934, as 
                           amended ("Exchange Act"), becomes the beneficial 
                           owner (within the meaning of Rule 13d-3 under the  
                           Exchange Act), directly or indirectly, of 33% or more
                           of the combined  voting power of the Company's  then
                           outstanding Common Stock,  provided that such person,
                           immediately  before  it  becomes  such  33%  or  more
                           beneficial   owner,   is  not   (a)  a   wholly-owned
                           subsidiary of the Company or (b) an individual,  or a
                           spouse or a child of such  individual,  that on March
                           12,  1994,  owned  greater  than 20% of the  combined
                           voting  power of such Common  Stock,  or (c) a trust,
                           foundation   or  other   entity   controlled   by  an
                           individual  or   individuals   described  in  Section
                           4(b)(3)(iii); or

                           iv.     individuals who constitute the Board on March
                           12, 1994 (the "Incumbent Board") cease for any reason
                           to constitute at least a majority thereof, provided 
                           that any person becoming a director subsequent to 
                           March 12, 1994, whose election, or nomination for 
                           election by the Company's shareholders, was approved
                           by a vote of at least three quarters of the directors
                           comprising the Incumbent  Board (either by a specific
                           vote or by  approval  of the proxy  statement  of the
                           Company  in which  such  person is named as a nominee
                           for director,  without  objection to such nomination)
                           shall be, for purposes of this clause iv,  considered
                           as though such person were a member of the  Incumbent
                           Board.

                  5.       Transferring of Option.  The Optionee's rights and 
interest may not be assigned or transferred in whole or in part either directly 
or by operation of law or otherwise (except in the event of the Optionee's 
death, by will or the laws of descent and distribution), including, but not by 
way of limitation, execution, levy, garnishment, attachment, pledge, bankruptcy
or in any other manner, and no such right or interest of the Optionee shall be 
subject to any obligation or liability of the Optionee.

                  6.       Option  Rights.  Neither the  Optionee nor any other 
person entitled to exercise the Option under the terms hereof shall be, or have 
any of the rights or privileges of, a shareholder of the Company in respect of 
any of the shares of Common Stock issuable on exercise of the Option, unless and
until the Option has been exercised  pursuant  to the terms hereof and the 
purchase price for such shares shall have been paid in full.

                  7.       Adjustment in the Event of Change in Stock. In the 
event of changes  in the outstanding Common Stock of the Company by reason of 
stock dividends, reverse split, subdivision, recapitalizations, mergers,
consolidations  (whether  or  not  the  Company  is  a  surviving  corporation),
split-ups,  combinations or exchanges of shares,  reorganization or liquidation,
an extraordinary dividend payable in cash or property, and the like, the number,
class and the price of shares of Common Stock subject to this outstanding Option
shall be  appropriately  adjusted  by the Board,  whose  determination  shall be
conclusive.

                  8.       Administration  of Option.  (a) The Option shall be 
exercised  in  accordance  with such administrative regulations as the Board 
shall from time to time reasonably adopt.

                  (b)  If  at  any  time  the  Board  shall  determine,  in  its
reasonable discretion, that the listing, registration or qualification of shares
upon any national  securities exchange or under any state or federal law, or the
consent or  approval  of any  governmental  regulatory  body,  is  necessary  or
desirable as a condition of, or in  connection  with the exercise of this option
hereunder,  the Option may not be exercised in whole or in part unless and until
such listing, registration,  qualification,  consent or approval shall have been
effected or obtained,  or otherwise  provided  for, free of any  conditions  not
acceptable to the Board in the exercise of its reasonable judgment.

                  9.       Investment Representation.  The  Board  may require  
the Optionee to furnish to the Company, prior to the issuance of any shares upon
the exercise of all or part of this Option, an agreement stating that the shares
acquired by him upon exercise are being  acquired for  investment and not with a
view to the sale or distribution hereof.

                  10.      Governing Law. The Option, and this agreement shall 
be construed, administered and governed in all respects under and by the laws of
the State of Delaware.





                  EXECUTED: December 29, 1997.

                                  MASTEC, INC.



                                   By: _________________________
                                       Jorge Mas, Chairman of the Board,
                                       President and Chief Executive Officer


                  The  undersigned  hereby accepts the foregoing  Option and the
terms and conditions hereof.



                                                   -----------------------------
                                                     Joel-Tomas Citron