Exhibit 31.2
Certifications
I, C. Robert Campbell, certify that:
| 1. | I have reviewed this Amendment No. 1 to Annual Report on Form 10-K/A of MasTec, Inc; |
| 2. | Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report. |
| Date: June 22, 2012 |
/s/C. Robert Campbell |
| C. Robert Campbell |
Chief Financial Officer (Principal Financial and Accounting Officer) |
