 The orchestra has also performed in the Lucerne Festival, the Salzburg Festival, the Salzburg Easter Festival and at the Proms.Many former members of the GMJO are now members of leading European orchestras, some of them in principal positions.Many conductors have cooperated with Gustav Mahler Jugendorchester, among them Claudio Abbado, Mariss Jansons, Pierre Boulez and Bernard Haitink.