Exhibit 31.2
CERTIFICATION PURSUANT TO SECTION 302 OF
THE SARBANES-OXLEY ACT OF 2002
I, Gregory S. Rush, 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/ Gregory S. Rush |
| Gregory S. Rush |
| Executive Vice President and Chief Financial Officer |
| (Principal Financial Officer) |
