Altimmune Inc. said Elizabeth Czerepak resigned as the company's CFO and executive vice president of corporate development.

Czerepak, who also performed the functions of the company's principal accounting officer, left to pursue other opportunities.

The Gaithersburg, Md.-based biotechnology company named Will Brown as acting CFO and principal accounting officer until a replacement is found.

Brown has been engaged by Altimmune as an independent consultant since February.