President George H. W. Bush appointed Shumway to the board of directors of Legal Services Corporation. He has also served on the boards of U.S. English, Goodwill Industries of America and Omniplex, Ltd. He was a member of the board of visitors of the J. Reuben Clark Law School at Brigham Young University from 1989 to 1991. He has served on the board of trustees of the Utah Council for Citizen Diplomacy and was a member of the Sons of Utah Pioneers. Boy Scouts of America and numerous volunteer associations have honored him. Following his years of service to his church, he became a member of the President's National Advisory Board at Utah Valley University and was president (2014 to 2018) of Mikuni International College in Yuzawa, Niigata Ken, Japan.
