Webcast Alert: MasTec, Inc. Announces
Schedule for Third Quarter Release and Conference Call Webcast

October 27, 2003

MIAMI, Oct. 27 /PRNewswire-FirstCall/ -- MasTec's (NYSE: MTZ) results of operations for the third quarter of 2003 will be released after market close on November 12, 2003. Executives of MasTec will also hold a conference call with the investment community on Thursday, November 13, 2003 at 10:30 a.m. eastern time, to discuss operational details for the quarter. The call in number for the conference call is (913) 981-5510 and the replay number is (719) 457-0820, with a pass code of 228066. The replay will run from August 13 to August 27. Additionally, the call will be broadcast live over the Internet at http://www.firstcallevents.com/service/ajwz391801243gf12.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
     www.mastec.com

SOURCE MasTec, Inc.