In 1993, De Cormier helped to found the Vermont Symphony Orchestra Chorus, which he conducted until his retirement in 2014. He founded Counterpoint, a Vermont-based choral group, consisting of eleven members.
In 1993, De Cormier contributed to the creation of the Vermont Symphony Orchestra Chorus, which he led until his retirement in 2014. He also established Counterpoint, an eleven-member choral organization based in Vermont.