ベルリン・ドイツ交響楽団
He has served as guest conductor for numerous orchestras in Europe and elsewhere, including the Bavarian State Opera, the Sächsische Staatskapelle Dresden, the MDR Symphony Orchestra, the Deutsches Symphonie-Orchester Berlin and the Hamburg State Opera (Hamburgische Staatsoper). Outside Germany, Joel has conducted at the Teatro Regio in Parma, Italy, the Finnish National Opera, Helsinki, Municipal Theater of Santiago, Chile, and the Théâtre des Champs-Élysées, Paris, among others.