Royal Bank of Canada’s U.S. compliance chief is no longer with the firm, at least the third executive to depart in the past two months.

Howard Plotkin, who was based in New York, left RBC Capital Markets in April, according to people with knowledge of the matter, who asked not be identified discussing personnel. While a search is underway for a replacement, his duties are being handled by global Chief Compliance Officer David Lang among others, one of the people said. Plotkin declined to comment when reached at home by phone Monday evening.

On June 4, Toronto-based RBC said its U.S. investment-banking chief, Blair Fleming, had left the company. On Friday, the firm revealed that he was fired for failing to disclose that he was having a relationship with an employee. Plotkin’s departure was unrelated to Fleming’s, one of the people said.

The firm’s U.S. head of health-care investment banking, Robert Steininger, departed in early May, a move that also was unrelated to Fleming’s, Bloomberg reported Monday.

Plotkin joined RBC in January 2010. Before that, he worked at Lehman Brothers Holdings Inc. and its successor, Barclays Plc.

--With assistance from Matthew Monks