sentences:  Since 1973 he has worked as conductor, coach, pianist, composer, and/or translator for the Metropolitan Opera (Assistant Chorus Master 1977-78), Bel Canto Opera, After Dinner Opera Company, Aviva Players, the Metropolitan Philharmonic Chorus, the Jewish Music Theater of Berlin, the Jewish People's Philharmonic Chorus, the Workmen's Circle Chorus, the Oceanside Chorale, the Blaue Jungs/Hanseaten Deern German Chorus of East Meadow, and the Bronx Opera.He edited "The Marc Blitzstein Songbook" (3v., Boosey & Hawkes 1999-2003), authored "Marc Blitzstein