The MCO has stable residencies in Ferrara (Ferrara Musica, honorary president: Claudio Abbado), Aix-en-Provence (Festival international d'art lyrique d'Aix-en-Provence), Toblach (Gustav Mahler Musikwochen), Lucerne (Lucerne Festival), Salzburg (Mozartwochen) and Landshut.
London Symphony Orchestra | Philadelphia Orchestra | orchestra | Chamber of Deputies | Gustav Mahler | Chicago Symphony Orchestra | Royal Philharmonic Orchestra | Cleveland Orchestra | chamber music | London Philharmonic Orchestra | Boston Symphony Orchestra | BBC Symphony Orchestra | National Symphony Orchestra | Electric Light Orchestra | Chamber of Commerce | Mahler | National Symphony Orchestra (United States) | Melbourne Symphony Orchestra | Boston Pops Orchestra | Sydney Symphony Orchestra | Royal Concertgebouw Orchestra | Minnesota Orchestra | Jerusalem Symphony Orchestra | Dallas Symphony Orchestra | International Chamber of Commerce | Toronto Symphony Orchestra | Cincinnati Symphony Orchestra | Yellow Magic Orchestra | Philharmonia Orchestra | Royal Scottish National Orchestra |
Soloists of prestigious orchestras as the Academy of Saint Martin in the Fields and the Mahler Chamber Orchestra, have been invited to work with Ensemble XXI on its International Music Course developed in the town of Peralta de la Sal, Huesca province, in Aragon; and on Master Classes held in the Conservatory of Music "Miguel Fleta" from Monzón.
Gershon has appeared as guest conductor with the Los Angeles Philharmonic, Houston Grand Opera, Santa Fe Opera, Minnesota Opera, Royal Swedish Opera, Juilliard Opera Theatre, Saint Paul Chamber Orchestra, Los Angeles Chamber Orchestra, the Gustav Mahler Chamber Orchestra and the Finnish chamber orchestra Avanti!, among others.