EX-23.1 4 dex231.htm CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM Consent of Independent Registered Public Accounting Firm

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements (Form S-8 Nos. 333-139996, 333-112010, 333-105781, 333-105516, 333-38932, 333-77823, 333-47003, 333-38940 and 333-30647 and Form S-3 Nos. 333-158502, 333-142083, 333-133252, 333-46067) of MasTec, Inc. of our report dated February 24, 2010 relating to the consolidated financial statements and the effectiveness of MasTec, Inc.’s internal control over financial reporting which appear in this Form 10-K.

/s/ BDO Seidman LLP

Miami, Florida

February 24, 2010