Career
He co-founded the band and appeared on the first six albums – War and Pain, Rrröööaaarrr, Killing Technology, Dimension Hatross, Nothingface, and Angel Rat. He departed the group in 1991 for personal reasons, and went on to co-found The Holy Body Tattoo Dance Society from 1992 to 1999. He composed, produced and engineered the scores for "White Riot", "L"Orage", "Poetry & Apocalypse", and "Our Brief Eternity".
In 1997 he released The Electronic Voice Phenomena Civil Defense with Mark Spybey and established the X-voto Recording label.
Thériault made a guest appearance in Brain Scan, a Voivod cover on the latest Martyr album Feeding the Abscess and performed it live at the release concert at the Montreal Medley in 2006. Thériault co-produced the Negativa self-titled three-song European Parliament with Pierre Rémillard at Wild Studio in Street-Zenon, Quebec.
Thériault returned to Voivod in 2008. Thériault released a statement on August 26, 2008, regarding his involvement with the band.
Thériault continues to create electroacoustic music
His collaboration Hiatus, created with Australian artist Matt Warren, was presented in conjunction with the photographic work of artists Lena Stuart and Sally Rees at the Richmond, Virginia, InLight Festival on September 5, 2008. Thériault composed, produced, recorded and edited the Voivod"s 2013 album Target Earth. On July 10, 2014, it was announced that he was forced out of the band, for months he requested meetings regarding the band business and artistic affairs, but was denied such talks by the other members.
Thériault is currently working with Monica Emond on a new artistic project called Landscape of Emergency.
He finally feels that now the music that he is writing is meaning something more than just writing Metal riff and it is 100% DIY. The duo have since released a song and video titled, "Castle Bravo."
Bass guitars
Liberatore guitar 1989, 5 strings East-A-Doctorate-G-B, dbl J-Electromyography:: self-custom design
Liberatore guitar 1987, 4 strings, dbl P-Electromyography:: self-custom design
Liberatore guitar 1986, 4 strings Kahler tremolo, dbl P-Dimarzio:: self-custom design
Fender Precision Bass 1972, 4 strings original (no mod)
Amps
1986-1988
2 Marshall JCM 800 Head with Forex mod by Rick Onslow
2 EV Custom 4x15in speaker cabinets
1989-1991
1 Marshall Serie 9000 PreAmp
Crown MicroTech 1200 Head
2 EV Custom 4x15in speaker cabinets
2008 to present
2 Marshall Serie 9000 PreAmp
1 Acoustic 270 Head
1 Gallien-Krueger 800RB Head
2 Ampeg SVT-810E cabs
Effects/Pedals
Yamaha SPX-90 II
Ibanez Doctor of Medicine-1000 Digital Delay.