EXHIBIT 31.1
Certification Pursuant to Rule 13a-14 under the Securities Exchange Act of 1934
I, Harold M. Messmer, Jr., certify that:
| 1. | I have reviewed this report on Form 10-K/A of Robert Half International Inc.; and |
| 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: October 15, 2009
/s/ Harold M. Messmer, Jr. |
Harold M. Messmer, Jr. Chairman and Chief Executive Officer |
