[1][2][3] McCollough graduated from Missouri Valley College in 1971, where he was a member of Tau Kappa Epsilon fraternity, and received an M.B.A. from Southern Illinois University in 1974.
[2][4] From 1975 to 1987, he worked at Milliken & Company, including as director of marketing.
[1][2][3] He sits on the board of directors of the Goodyear Tire and Rubber Company (since 2007), La-Z-Boy and the VF Corporation.
[2] He sits on the board of trustees of the Joslin Diabetes Center.
[1] He sits on the board of directors of the VIM-Volunteers In Medicine clinic Hilton Head.