Comeau originally started his musical career with the band Reset which he formed in 1993 with bandmate Pierre Bouvier. He left Reset in 1998 to pursue a degree in law at McGill University.
He reunited with Bouvier at a Sugar Ray concert and after he left school, he formed Simple Plan with Bouvier. Aside from drumming, Comeau writes lyrics for the band. In 2008, he was a judge for the 7th annual Independent Music Awards.