He collaborated with saxophonist Bobby Watson (as principal clarinetist with the Opera Ebony of Harlem) and has performed with such groups as ALEA III, the American Opera Musical Theater Company, the Andover Chamber Players, the Greenwich Village Orchestra and many New York and Boston area orchestras.
opera | Metropolitan Opera | Royal Opera House | Sydney Opera House | Vienna State Opera | San Francisco Opera | New York City Opera | The Phantom of the Opera (1986 musical) | The Threepenny Opera | Opera | Doctors (soap opera) | Falstaff (opera) | Paris Opera | Royal Swedish Opera | Opera Australia | Lyric Opera of Chicago | Boris Godunov (opera) | The Beggar's Opera | Tannhäuser (opera) | Santa Fe Opera | opera house | Houston Grand Opera | Zurich Opera | Opera North | Dallas Opera | English National Opera | Welsh National Opera | Lulu (opera) | Faust (opera) | Eugene Onegin (opera) |
She has been commissioned to write works for the American Guild of Organists, George Shirley, the late Duke Ellington, and her sister, the late Joy Simpson, arranged music for Kathleen Battle, Jessye Norman, and the Porgy and Bess Chorus of the New York Metropolitan Opera, and has performed with musical organizations such as Philadelphia's National Opera Ebony (later renamed Opera North).