MasTec (MTZ) 8-K/A Changes in Registrant.s Certifying Accountant

June 7, 2005

U.S. Securities and Exchange Commission
Office of the Chief Accountant
450 Fifth Street, NW
Washington,
DC 20549

RE: The MasTec, Inc. 401(k) Retirement Savings Plan File No. 0-08106

Dear Sir or Madam:

We have read Item 4.01 of Form 8-K/A of The MasTec, Inc. 401(k) Retirement Savings Plan dated June 7, 2005 and agree with the statements concerning our Firm contained therein.

Very truly yours,

/s/ Grant Thornton LLP
Richard D. Jacobson
Partner