Exhibit 31.3
CERTIFICATION OF CHIEF EXECUTIVE OFFICER
PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT
I, Richard J. Alario, certify that:
1. I have reviewed this Amendment No. 1 on Form 10-Q/A of Key Energy Services, 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.
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| /s/ Richard J. Alario |
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| Richard J. Alario |
Date: November 5, 2007 |
| President and Chief Executive Officer |
