Exhibit 31.1
CERTIFICATION PURSUANT TO SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002
I, D. Jamie Macdonald, certify that:
| 1. | I have reviewed this Amendment No. 1 to Annual Report on Form 10-K of INC Research Holdings, 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: March 14, 2016
/s/ D. Jamie Macdonald |
| D. Jamie Macdonald |
| Chief Executive Officer |
| (Principal Executive Officer) |
