Denis Sheahan (left) and Mark Thompson (right) of Cambridge Trust

Long-time local banker and Cambridge Trust Co. President Mark D. Thompson will retire at the end of the year.

Cambridge Trust Co. announced in an SEC 8-K report yesterday that Thompson had notified the bank he would retire on Dec. 31. Thompson remains on the board of directors, the bank said, adding that there were no disagreements between Thompson and Cambridge Trust.

Before joining Cambridge Trust in 2017, Thompson was at Boston Private Bank for 21 years, including as the bank’s CEO from 2003 to 2015.

In between his time at Boston Private and Cambridge Trust, Thompson led a team that attempted to raise capital to buy what was then called Admirals Bank. That transaction fell through in 2017. Admirals Bank later raised capital and rebranded as Ethic, a Wealth Bank.

Thompson was also an executive vice president and founding officer at Wainwright Bank, which was acquired by Eastern Bank 10 years ago.