Fitzgerald will fill the Washington seat and be a member of the audit, enterprise risk, executive and finance committees.
His term began March 26 and expires at the end of 2017.
Fitzgerald was a co-founder of Bank of Georgetown in 2005. It had assets of $928 million at yearend and operates 11 branches in the District of Columbia, Maryland and Virginia.
Fitzgerald has more than 32 years of commercial banking experience in the Washington area; he previously worked at SequoiaBank and Riggs Bank.