He conducts the Yale Glee Club, an eighty-voice mixed chorus, and teaches graduate courses in choral conducting and literature. He has appeared as a guest conductor with choruses and orchestras on six continents, has prepared ensembles for such eminent conductors as Gergiev, Marriner, Willcocks, Orbellian, and Penderecki, and has premiered new works by such composers as Argento, Sandström, Hoiby, and Macmillan. Douma has sung with the Dale Warland Singers, Oregon Bach Festival Chorus, and Robert Shaw Festival Singers, and holds the B.Mus. degree (Concordia College, Moorhead, MN) and DMA (University of Michigan). 6