Robert Kaminski serves as the CEO of the third-largest Michigan-based bank by deposit market share. He became an entrepreneur when he and five of his colleagues founded Mercantile Bank in 1997 after he started his banking career at First Michigan Bank. Throughout the bank's 25 years, Kaminski has influenced its growing success. He became the president of the bank in 2007. In 2014, Mercantile Bank merged with Firstbank Corp., a holding company for several banks in Michigan, including Keystone Community Bank and Ionia County National Bank. The merger of equals, at the time, catapulted Mercantile Bank to becoming the fourth-largest Michigan-based bank by deposit market share. In 2017, the West Michigan native assumed the role of president and CEO of its holding company, Mercantile Bank Corp. The bank has 26 locations across Michigan.