EXHIBIT 31.1
CERTIFICATION
I, Charles J. Link, Jr., certify that:
| 1. | I have reviewed this quarterly report on Form 10-Q/A of NewLink Genetics Corporation; |
| 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: August 24, 2015
| By: | /s/ Charles J. Link, Jr. |
| Charles J. Link, Jr. | |
| Chief Executive Officer | |
| (Principal Executive Officer) | |