He served in the Legislative Assembly of Ontario from 1971 to 1987, and as cabinet minister in the governments of Bill Davis and Frank Miller.
He also served as director of the Central Canada Exhibition Association from 1965 to 1978 and was president of the Ottawa Sooner Jr. Football Club from 1965 to 1973.
[10] The PCs were reduced to a tenuous minority government under Miller's leadership in the 1985 provincial election, and Bennett retained his seat by only 1,337 votes (39.4%) against Liberal Party challenger Andrew Caddell (35.3%).
[11] He continued to serve as Minister of Tourism and Recreation and was also named Chair of Cabinet, but he accomplished little in this position before the Miller government was defeated in the house in June 1985.
On June 29, 2007, he was appointed to sit on the board of directors of the Royal Canadian Mint for a four-year term.