MIAMI, May 12 /PRNewswire-FirstCall/ -- MasTec, Inc. (NYSE: MTZ) announced that it will release first quarter results after the markets closes on Tuesday, May 13th. Executives of MasTec will hold a conference call with the investment community on Wednesday, May 14, 2003 at 10:30 a.m. eastern time, to discuss first quarter results. The call in number for the conference call is (719) 457-2626 and the replay number is (719) 457-0820, pass code 537483. The replay will run from May 15 to May 29, utilizing the same passcode. Additionally, the call will be broadcast live over the Internet at http://www.firstcallevents.com/service/ajwz381530668gf12.html or through the investor relations section of the Company's website at www.mastec.com.

MasTec is a leading communications and energy infrastructure service provider in North America and Brazil. We design, build, install, maintain and monitor internal and external networks for leading telecommunications, broadband, energy and Fortune 1000 companies.

     For Info, Contact:
     J. Marc Lewis
     Vice President - Investor Relations
     MasTec, Inc.
     305-406-3165
     305-406-3138 (Fax)
     marc.lewis@mastec.com

SOURCE MasTec, Inc.