Exhibit 31.3
CERTIFICATION OF CHIEF EXECUTIVE OFFICER PURSUANT TO
EXCHANGE ACT RULE 13a-14(a)
I, Colin Shannon, certify that:
| 1. | I have reviewed this Amendment No. 1 to the Annual Report on Form 10-K/A of PRA Health Sciences, 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 30, 2021 | By: | /s/ Colin Shannon | |
| Colin Shannon | ||||
| Chief Executive Officer |