Boston Private Bank & Trust Company has appointed Tim MacDonald as vice president and chief risk officer, replacing Robert Buffum, Boston Business Journal reports.

In his new role MacDonald will become chair of the risk management oversight committee and serve as a member of the bank’s key governing committees, including its policy group, according to the report. He was latterly a member of the enterprise risk management group at the firm’s parent company, Boston Private Financial Holdings.

Buffum, meanwhile, reportedly remains at the bank, but no further details were given on what his position will be going forward.