CORAL GABLES, Fla., Dec. 23 /PRNewswire-FirstCall/ -- MasTec, Inc. (NYSE: MTZ) announced that it intends to release results for the first and second quarters of 2004 after market close today in conjunction with the filing of the Company's related 10-Qs.

MasTec (http://www.mastec.com ) is a leading communications, broadband, intelligent traffic and energy infrastructure service provider. The Company designs, builds, installs, maintains, upgrades and monitors internal and external networks for leading companies and government entities.

This press release and any accompanying documents contain forward-looking statements, such as statements regarding MasTec's future growth and profitability, growth strategy, and anticipated trends in the industries and economies in which MasTec operates. The words "anticipate," "estimate," "should," "expect," "believe," "intend," "target," "project" and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based on MasTec's current expectations and are subject to a number of risks, uncertainties, and assumptions, including that our revenue and profits may differ from that projected, that we may be further impacted by slowdowns in our clients' businesses or in the economy in general, that our reserves for receivables may be inadequate and that we may experience increased costs associated with realigning our business or may be unsuccessful in those efforts. 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 MasTec in this press release. These and other risks are detailed in this press release and/or documents filed by MasTec with the Securities and Exchange Commission. MasTec does not undertake any obligation to revise these forward-looking statements to reflect future events or circumstances.

SOURCE  MasTec, Inc.
    -0-                             12/23/2004
    /CONTACT:  J. Marc Lewis, Vice President -- Investor Relations of MasTec,
Inc., +1-305-406-1815, or fax, +1-305-406-1886, or marc.lewis@mastec.com /
    /Web site:  http://www.mastec.com /
    (MTZ)

CO:  MasTec, Inc.
ST:  Florida
IN:  TLS
SU:  CCA MAV

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5793 12/23/2004 11:26 EST http://www.prnewswire.com