He started playing keyboards in Rock bands at 15 and co-founded Nathan Mahl at age 20 with Mark Spenard, Don Prince and Dan Lacasse.

[3] After reforming Nathan Mahl several times over many years through to the present, LeBlanc managed to record a few of these lineups, and chose to release some of these as independent discs.

In 2004, he released his second solo disc All the Rage,[10] and recorded with Nathan Mahl the opening track to Odyssey,[11] a 9 band collaboration spearheaded by The Finnish Progressive Music Association Colossus and the French label Musea.

In 2011, Guy joined his friend David Campbell's band The Rebel Wheel in time for their appearance at the Prog Day festival 2011.

Songs: Aptly titled All the Rage[19] and composed over a 2-year period, the disc parallels the tumultuous personal events that have helped shape this artist's life and work.