Sheehy was appointed Chairman and CEO, Mid Atlantic Division, M&T Bank, and to the Executive Management Committee and Board of M&T in April 2003, following the merger of Allfirst and M&T.
Following the merger of Allfirst and M&T in April 2003, Sheehy was appointed as Chairman and CEO of the Mid-Atlantic Division of M&T Bank, and also joined the Executive Management Committee and Board of Directors for M&T.