Daryl R. Tressler, president and CEO of MainSource Bank, will retire effective December 31, 2016.

Tressler joined MainSource Bank in 1973. In his 43-year MainSource banking career Tressler has served in numerous banking and management roles, including accounting, mortgage lending, commercial banking and as president of several MainSource affiliate entities.

In recent years Tressler served as the holding company’s chief banking officer and was the president, CEO and a director of MainSource Bank. Under Tressler’s leadership, MainSource Bank has grown into a strong community bank with $4 billion in assets and 90 branch offices in four states.

Archie Brown, president and CEO of MainSource Financial Group, said, “Daryl is an extremely talented banker who has been a strong and steady leader in our company and in our community. We have been fortunate to have Daryl work for us for his whole career. As a respected leader of the company, Daryl has made a lifelong impact on many employees as well as community and professional colleagues. We will miss Daryl’s leadership and contribution and we wish him great health and much happiness in his retirement.”