CINCINNATI--(BUSINESS WIRE)--Fifth Third Bancorp (Nasdaq: FITB) announced today that Dan Poston, its executive vice president and chief strategy and administrative officer, is leaving the Bank to join Vantiv, Inc., as executive vice president, strategic client relations. In his new role at Vantiv, of which Fifth Third is a significant customer, Poston will manage the relationship with the Bank, among other duties. Dan’s last day with Fifth Third Bank will be Oct. 1. “This is a terrific opportun