as of May 29, 2000.

     Olaf Olafsson and William Shiebler re-elected to Board of Directors.
               Annual Shareholders Meeting remarks summarized.

MIAMI, May 17 /PRNewswire/ -- MasTec, Inc. (NYSE: MTZ) announced today that its Board of Directors had approved a three-for-two stock split in the form of a stock dividend on its approximately 31.1 million shares of common stock outstanding. The dividend will pay one share of common stock for every two shares of common stock outstanding. The dividend will be paid on June 19, 2000 to shareholders of record as of the close of business on May 29, 2000.

In addition, MasTec announced that Olaf Olafsson and William Shiebler had been re-elected as directors of the company at MasTec's Annual Meeting of Shareholders. Mr. Olafsson is Vice Chairman of Time Warner Digital Media. Mr. Shiebler was formerly Senior Managing Director of Putnam Investments. Each was elected to a three-year term.

MasTec also summarized remarks made at the Annual Meeting. The company reiterated its strategy of emphasizing organic growth, developing the MasTec brand name, expanding higher value service offerings and pursuing strategic acquisitions and alliances. MasTec said it expected 20-25% internal revenue growth in 2000, particularly in broadband solutions and switching and access services. The company also stated that it was implementing certain "best practices" focusing on margin improvements, further leveraging administrative resources, better managing working capital to continue strengthening the balance sheet, and enhancing capital utilization.

MasTec is the largest end-to-end communications and energy infrastructure service provider in North America. MasTec <www.mastec.com> designs, builds, installs and maintains internal and external networks supporting the Internet, Internet-related applications, e-commerce and other communications and energy facilities for leading telecommunications, cable television, energy and Fortune 500 companies.

This press release and any accompanying documents contain or may contain forward-looking statements, such as statements regarding the Company's future growth and profitability, growth strategy, and anticipated trends in the industries and economies in which the Company operates. These forward-looking statements are based on the Company's current expectations and are subject to a number of risks, uncertainties, and assumptions. Should one or more of these risks or uncertainties materialize, or should the underlying assumptions prove incorrect, actual results may differ significantly from results expressed or implied in any forward-looking statements made by the Company in this press release. These and other risks are detailed in this press release or documents filed by the Company with the Securities and Exchange Commission. The Company does not undertake any obligation to revise these forward-looking statements to reflect future events or circumstances.
SOURCE MasTec, Inc.
Web site: http: //www.mastec.com
CONTACT: Carmen M. Sabater, Senior Vice President & CFO of MasTec, Inc., 305-406-1866, or csabater@mastec.com