In 2000, following an 11-year professional career played mostly in France, Groulx turned to coaching, taking an assistant position with the Shawinigan Cataractes of the QMJHL.

[3] In his first season as head coach, he led the Crunch to the Calder Cup Finals and an Eastern Conference title.

During the 2021 Syracuse Crunch training camp, Groulx fractured his left elbow after falling down at practice.

[5] In 2021, Groulx interviewed for the head coach position of the Arizona Coyotes, after a vacancy was left by Rick Tocchet.

[8] Groulx's son, Benoit-Olivier, also known as "Bo" was selected 54th overall by the Anaheim Ducks in the 2018 NHL Entry Draft.