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.
De Cormier's involvement began with the founding of the Vermont Symphony Orchestra Chorus in 1993, a position he held until his retirement in 2014. He then went on to establish Counterpoint, a Vermont-based vocal group consisting of eleven members.