NEWS
For Immediate Release                   From MasTec, Inc.
January 26, 1998                        3155 N.W. 77th Avenue, Suite 135
                                         Miami, Florida 33122-1205
                                         Tel :    (305) 599-1800
                                         Fax :    (305) 406-1908
                                         For more information contact:
                                         Edwin D. Johnson,
                                         Chief Financial Officer
                                         ejohnson@mastec.com


                 MASTEC, INC. ANNOUNCES LABOR AGREEMENT IN SPAIN

MIAMI,  FL - MasTec,  Inc.  (NYSE:  MTZ) announced  today that it has reached an
agreement with the unions representing its Spanish workforce regarding the terms
of a new collective  bargaining  agreement,  subject to  ratification  and final
documentation.   The  agreement   contemplates   reductions  in   administrative
positions,   reductions  in  certain  non-wage  compensation  and  increases  in
productivity  benchmarks.  The agreement also  contemplates  an increase in base
wage rates for remaining union workers.

The agreement  culminates  several months of negotiations with the labor unions.
Disagreement  with the unions over  contract  renewal  terms  pre-date  MasTec's
acquisition  of Sintel from  Telefonica  and escalated when the Company filed an
application  with Spanish labor  authorities in September 1997 to  substantially
restructure  the  workforce.  Sintel  suspended its  application in November and
entered  into  mediation  with the unions led by  Sintel's  new chief  executive
officer, Juan Antonio Casanova.

Jorge Mas,  Chairman and Chief  Executive  Officer,  said:  "We are satisfied to
announce  that we have come to a mutually  acceptable  agreement  to resolve our
labor  impasse  in  Spain.  We  believe  the  new  agreement  will  allow  us to
aggressively  pursue the  expanding  Spanish  telecommunications  infrastructure
market to the benefit of both the Company and its employees."

Opening the Lines of  Communication(R)  worldwide,  MasTec is one of the world's
leading telecommunications and related infrastructure service providers, serving
clients throughout the United States, Latin America and Spain.

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