NEWS
For Immediate Release                           From: MasTec, Inc.
March 19, 1998                                  3155 N.W. 77th Avenue, Suite 135
                                                Miami, Florida 33122-1205
                                                Tel :    (305) 599-1800
                                                Fax :    (305) 406-1908
                                                For more information contact:
                                                Investor Relations Department
                                                invrels@mastec.com


     MASTEC, INC. ANNOUNCES JOINT VENTURE TO DEVELOP PCS LICENSE IN PARAGUAY

MIAMI, FL - MasTec, Inc. (NYSE: MTZ) announced today that it has been successful
in  obtaining  a license  in  Paraguay  to  construct  and  operate  a  personal
communication  system (PCS) with  national  coverage.  In addition,  the company
announced that it has reached agreement with Inepar, S/A Industria e Construcoes
(Sao Paulo Stock Exchange:  IN), (Inepar), its partner in Brazil, and with Iecsa
S.A., a subsidiary of  SOCMA-Sociedad  Macri (the Macri  Group),  its partner in
Argentina and Chile,  to share in  development  of the system.  The Company will
operate under the name Comunicaciones  Personales,  S.A. (Copesa). The agreement
provides that the network  construction  for the PCS system will be performed by
MasTec Inepar S/A - Sistemas De  Telecomunicacoes  (MasTec-Inepar),  a Brazilian
telecommunications  infrastructure  construction company owned 51% by MasTec and
49% by Inepar.

Jorge Mas,  Chairman and Chief Executive  Officer,  said: "The  opportunities to
create  shareholder  value  through  relatively  minor  investments  in selected
markets continue to present  themselves to us. Current telephony  penetration in
Paraguay is  estimated to be a mere 3 lines per 100  inhabitants,  the lowest in
South  America.  A substantial  backlog in demand for service bodes well for our
investment  and we look  forward to working  with  Inepar and the Macri Group to
capture a significant piece of the market as rapidly as possible."

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.  For more
information, please visit our web site at www.mastec.com.
                                    
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