(Toronto) The Bank of Montreal announced Thursday the appointment of Darrel Hackett to head the bank’s US operations, its current leader, Dave Casper, to retire.

The bank said that effective June 1, Mr. Hackett would be CEO of the U.S. division of Bank of Montreal, President and CEO of BMO Harris Bank and CEO of the holding company. American bank, BMO Financial Corp.

Mr. Hackett most recently served as President of BMO Wealth Management in the United States, and has held several leadership positions since joining the bank in 2004.

He comes into the role as Bank of Montreal works to integrate its $16.3 billion acquisition of California bank Bank of the West, which closed in February.

Darryl White, CEO of Bank of Montreal, said in a statement that Mr. Hackett’s dedication to customers, his leadership in the community and the importance he places on inclusion would be key to the success of the bank’s operations in the United States.

The Bank of Montreal said Mr. Casper, who joined the bank in 1984, will serve as chairman of the board of directors of BMO Financial Corp. after leaving his current position.