Exhibit 31.4
CERTIFICATION
I, Frank E. Verdecanna, certify that:
| 1. | I have reviewed this Amendment No. 1 to Annual Report on Form 10-K of Mandiant, 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: April 28, 2022 |
/s/ Frank E. Verdecanna | |
| Frank E. Verdecanna | ||
|
Executive Vice President and Chief Financial Officer (Principal Financial Officer) |