Enterprise Financial Services Corp. on Tuesday named Stephen P. Marsh as chairman and CEO of its Enterprise Bank & Trust subsidiary, effective May 1.

Marsh will succeed Peter F. Benoist, who, as previously reported, will become president and CEO of the bank’s parent, Enterprise Financial Services Corp., on that date.

Marsh is currently president and senior loan officer for Enterprise Bank & Trust.

In his new position, he will be responsible for all of Enterprise’s banking operations in its three current markets — St. Louis, Kansas City and Phoenix. Marsh retains his role as chief credit officer with responsibility for setting and overseeing the bank’s credit policies.