Cambridge Savings Bank President and CEO Robert M. Wilson has taken a medical leave of absence from the bank and is being replaced by former board chairman Kevin J. Fitzgerald.

Fitzgerald has been involved with $2.3 billion Cambridge Savings for more than 45 years, including stints as president and COO. He’ll serve as acting president and CEO in Wilson’s absence.

Wilson, who joined the bank as an executive vice president in 1995, succeeded Fitzgerald as CEO at the end of 2006.

Fitzgerald began working at Cambridge Savings as part of a college cooperative education program and started full-time upon graduation in 1967.

"Bob Wilson has ably led Cambridge Savings Bank as a force for positive change in the communities it serves," Alan J. McClennan, chairman of Cambridge Savings and its holding company, Cambridge Financial Group, said in a prepared statement. "While we await Bob’s return, Kevin will continue to focus on growing our strong commercial and consumer lending franchises, as well as our ongoing community reinvestment efforts."