For the 2009–10 season, he was hired as the goaltenders' coach of the Chicoutimi Saguenéens, a Quebec Major Junior Hockey League (QMJHL) team.

On June 7, 2000, Denis was traded to the Columbus Blue Jackets for a second-round pick in the 2000 draft (used to choose Tomas Kurka).

In the 2007–08 season, on December 28, due to his sub-par and inconsistent play, the Lightning waived Denis.

Denis, who therefore became a free agent, then signed a contract with his hometown team, the Montreal Canadiens, on July 3, 2008.

[4] After training camp, Marc Denis was assigned to Montreal's AHL affiliate, the Hamilton Bulldogs.