Renwick was known for his work in the structure of Canadian hockey off the ice. Renwick helped to establish the Canadian Amateur Hockey Association, (known today as Hockey Canada. He was CAHA president from 1977 to 1979, and served on the Board of the IIHF for a period of twenty years. As a board member, he organized Russian club tours of Canada. In addition, Renwick was one of the organizers of the Canadian Wrigley Cup National Midget Tournament, known today as the TELUS Cup. In his hometown, Renwick was one of the founders of the Galt Hornets. As the Hornets celebrated two Allan Cup wins, Renwick served as its president. The senior Central Canadian Championship Renwick Cup is named in his honor. The winner of that title advances to the Allan Cup.
He was part of the inaugural group of recipients along with Jean Béliveau, Cassie Campbell-Pascall, Wayne Gretzky and Gordie Howe. The 76 year old Renwick will receive the honour at the Hockey Canada Foundation Gala on June 25 in Toronto. Renwick has five children and over twenty grandchildren.