Brett served in the South Carolina House of Representatives from 1982 until 1986. In addition, he was the Congressional Staff Aide to U.S. Representative Carroll A. Campbell, Jr. and later served as a campaign manager for Campbellā€™s 1984 re-election campaign.

Brett left that post in 1987 to become director of governmental affairs and community relations for Michelin North America.

Since leaving Michelin in 1993, Brett has managed his own public relations companies ranging in size from small to large. In 2015, Brett downsized to form BrettSC to take on a small number of key clients of his choosing.