CORAL GABLES, Fla., March 11 /PRNewswire-FirstCall/ -- MasTec, Inc. (NYSE: MTZ) today announced that it will file for the automatic 15-day extension period, as provided for under SEC regulations, by filing SEC Form 12b-25 to allow the Company's new auditors additional time to complete their audit, audit opinion and internal control certification. Even though the SEC has granted all companies an additional 45 days after March 16 to complete their Sarbanes-Oxley 404 certification work, MasTec's management believes that the entire process can be completed by the end of the month.

The Company expects to file the 10-K on, or before, March 31, with the conference call immediately following. The exact timing and details of the earnings release, and related conference call, will be announced as soon as they are available.

C. Robert Campbell, MasTec's Executive Vice President and Chief Financial Officer, commented, "We fully expect to make a timely filing within the 15-day automatic extension window, with the filing including both the audited financial statements and all newly required Sarbanes-Oxley attestations and certifications."

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-                             03/11/2005
    /CONTACT:  J. Marc Lewis, Vice President-Investor Relations, MasTec,
+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 CPR
SU:

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0378 03/11/2005 10:10 EST http://www.prnewswire.com