- Ms. Bush Is President of Bush International, Inc., an international
      financial advisory firm
    - Formerly Managing Director of the Federal Housing Finance Board, Head of
      International Finance at Fannie Mae, and Alternate Executive Director of
      the International Monetary Fund
    - Board of Directors Expanded to Eight, Including Six Outside Directors

MIAMI, July 10 /PRNewswire/ -- MasTec, Inc. (NYSE: MTZ) announced today that Mary K. Bush has been elected to MasTec's Board of Directors, expanding MasTec's Board to eight members including six outside directors.

Ms. Bush is currently the President of Bush International, Inc., a financial advisory firm. Ms. Bush currently serves on the Board of Directors of the Mortgage Guaranty Insurance Corporation, Texaco, Inc. and R.J. Reynolds, Inc., among others. Ms. Bush has served as Managing Director of the Federal Housing Finance Board, Vice President and Head of International Finance at Fannie Mae, and as Alternate Executive Director (Board Member) of the International Monetary Fund.

"Mary's government and finance experience will be invaluable as MasTec pursues opportunities with government entities and financial institution clients," said Jorge Mas, MasTec's Chairman.

Ms. Bush spent the first decade of her career with major international banks in New York City as banker for Fortune 500 companies. In 1982, she joined the U.S. Treasury Department and later served on the Federal Housing Finance Board, Fannie Mae and the International Monetary Fund. At the IMF, she represented the U.S. Government on international lending and policy matters and led the development of a new IMF lending program of several billion dollars to emerging market countries. She has also served as Financial Advisor at the District of Columbia Financial Responsibility and Management Assistance Authority advising the District of Columbia government on financing matters and investor relation issues.

MasTec is a leading 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 1000 companies.

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SOURCE MasTec, Inc.
Web site: http: //www.mastec.com
CONTACT: Carmen M. Sabater, Senior Vice President & CFO of MasTec, 305-406-1866, or csabater@mastec.com