He was music advisor to the Detroit Symphony Orchestra from 1981 to 1983 and the Principal Conductor of the Cologne Radio Symphony Orchestra from 1983 until 1991. He also served as general music director of the Opern- und Schauspielhaus Frankfurt from 1987 to 1990, the Tokyo Metropolitan Symphony Orchestra from 1998 to 2005, and, just before he died, director of the Teatro di San Carlo in Naples. He also worked as a guest conductor with the Hamburg State Opera, Scottish Opera, La Scala, Opéra National de Paris, and the Berlin Philharmonic among other organizations.[2]