In 1984 he became composer in residence for George Coates Performance Works, a San Francisco based theater company for which he composed music for a number of music theater works including RARE AREA, ACTUAL SHO, RIGHT MIND, THE ARCHITECTURE OF CATASTROPHIC CHANGE, INVISIBLE SITE , THE BOX CONSPIRACY and THE NOWHERE BAND .
Marc's music has been performed in Japan, the Kaii Festival in Belgium, Theater der Weld in Germany, Yugoslavia, Poland, at the Kennedy Center Opera House in Washington D.C, the Spoleto USA Festival and the Pepsico Summerfare in New York.