He started his CFL coaching career in 2001 with the Calgary Stampeders as a special-teams co-ordinator/receivers coach and became the team's offensive co-ordinator the next season.
Chapdelaine, 53, spent 10 seasons (2003-'06, 2008-'13) with the B.C. Lions, including six years as offensive co-ordinator. In 2007, he was an assistant head coach and offensive co-ordinator with the Edmonton Eskimos.
He succeeds George Cortez as offensive co-ordinator in Saskatchewan. The Roughriders finished third in the West Division last season with a 10-8 record but dropped an 18-10 decision to Edmonton in the division semifinal.
Chapdelaine spent last year as head coach at Simon Fraser University in the NCAA's Great Northwest Athletic Conference. As a player, Chapdelaine starred with the SFU Clan before a seven-year CFL career that included stops in B.C., Montreal, Hamilton and Calgary.