United Producers, Inc. (UPI), Columbus, Ohio Dennis Bolling announced his retirement from president and CEO, effective end of the year. Bolling joined the company in 1989 as chief executive officer of UPI’s predecessor company, Producers Livestock Association. Immediately prior, Bolling served as an officer with CoBank, serving cooperatives throughout Ohio. Bolling also worked in several capacities with Ralston Purina. Mike Bumgarner, chief operating officer, was tapped to succeed Bolling. Bumgarner was previously with UPI from 1990 to June 2009 and held several management roles. In 2009, he left to establish the Center for Food and Animal Issues within Ohio Farm Bureau. He re-joined UPI in September 2013 to take on his current role.