Cambridge Savings Bank announced Wednesday the resignation of president and chief executive Robert M. Wilson, who took a medical leave of absence earlier this year.

The effective date of the resignation is Dec. 31. Wilson will remain with the bank as a member of its board of directors.

The bank said its board of directors has convened a succession committee to identify a new chief executive.

Advertisement - Continue Reading Below

Kevin J. Fitzgerald, a former chairman of the bank’s board who has worked with Cambridge Savings for more than 45 years, has served as acting president and CEO of the bank since June, the bank said.

Cambridge Savings Bank has about $2.3 billion in assets. One of the oldest and largest community banks in Massachusetts, it operates 16 branches in such communities as Cambridge, Arlington, Belmont, Burlington, Concord, Lexington, Newton Centre, and Watertown.