Ensemble Intercontemporain Names Music Director The graying but still spry grandfather of new-music groups, the Ensemble Intercontemporain, said on Friday that the composer and conductor Matthias Pintscher would become its next music director, starting in 2013. Mr. Pintscher, 41, who has an increasingly busy conducting career along with his work as a composer, will succeed Susanna Mälkki. Born in West Germany and now living in New York, Mr. Pintscher will serve as one of the conductors with the New York Philharmonic in a performance of Stockhausen's "Gruppen," a work for three orchestras, at the Park Avenue Armory next week. Pierre Boulez founded the Paris-based Ensemble Intercontemporain in 1976. It has 31 members who play a wide variety of recent works, a model followed by many new groups.