Robert De Cormier was Music Director and Conductor of the New York Choral Society from 1970–1987 and was a Music Director Emeritus. 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 which consists of eleven members. He has conducted music for the operas Der Kaiser von Atlantis and Brundibár. He has also recorded several Christmas albums with his choral group, The Robert De Cormier Singers.