Equally comfortable on the opera stage, Aaron has garnered critical acclaim for his leading roles with the Boston Early Music Festival, Opera Lafayette, American Opera Theater, and Intermezzo Chamber Opera. His leading roles include Orfeo in Monteverdi’s Orfeo, L'Amour and Apollon in Lully's Psyché, Actéon in Charpentier's Actéon, and Acis in Handel's Acis and Galatea.
Mr. Sheehan also continues to work extensively in the chamber music world. He has sung with Theater of Voices, Blue Heron Choir, Tenet, Fortune's Wheel, La Donna Musicale, Folger Consort, Newberry Consort, Dünya, The Rose Ensemble, and the Pro Arte Singers. His recordings include the Grammy nominated operas Thésée and Psyché of Lully, recorded with BEMF on the CPO label. He is currently on the voice faculties of Boston University and Wellesley College