Exhibit 31.2
CERTIFICATION OF THE CHIEF FINANCIAL OFFICER PURSUANT TO RULE 13a-14(a) OF THE
SECURITIES AND EXCHANGE ACT OF 1934
I, William L. Lusk, Jr., Chief Financial Officer of First Security Group, Inc., certify that:
| 1. | I have reviewed this report on Form 10-K of First Security Group, 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 29, 2010
/s/ WILLIAM L. LUSK, JR. |
| William L. Lusk, Jr. |
| Chief Financial Officer |
