 With The Philadelphia Singers, Hayes conducted numerous Philadelphia and World Premieres including works of Jennifer Higdon, Ezra Laderman, Robert Capanna, Thomas Whitman and Morton Feldman.David Hayes is a conductor with an unusually broad range of repertoire, spanning the symphonic, oratorio/choral, and operatic genres.He has made his Philadelphia Orchestra conducting debut in May, 2003 sharing a program with Wolfgang Sawallisch.