Phoenix-based Arizona Bank & Trust said Dec. 19 that it has appointed President William Callahan as president and CEO.
Callahan previously served as president at Dubuque Bank and Trust Co. He succeeds Gerald Schwallier, who was named chairman.
According to the bank's website, Paul Muscenti was the previous chairman of the bank.
Arizona Bank & Trust and Dubuque Bank and Trust are units of Heartland Financial USA Inc.