In recent seasons, he has been seen at the Hamburg State Opera with Carmen, Tosca, and Die tote Stadt; at the Bavarian State Opera with Wolf-Ferrari's Il Segreto di Susanna and Lehár's Schön ist die Welt; at the Deutsche Oper Berlin with Tosca; the Vienna State Opera with Tosca, Die Fledermaus and Die tote Stadt; at the Hessisches Staatstheater Wiesbaden with Turandot, Carmen and The Merry Widow; at the Gothenburg Opera with Die schweigsame Frau; and at the Aalto Theater Essen with Der Freischütz. He also served as the conductor for Marina Abramovic’s the Seven Deaths of Maria Callas at the English National Opera, the Opéra de Paris, the Greek National Opera, the Deutsche Oper Berlin, the Teatro San Carlo and the Bavarian State Opera.
Recent guest engagements as a concert conductor have taken Gamzou to the Copenhagen Philharmonic, the Sinfonieorchester Bern, the Jyväskylä Sinfonia, the Bremen Philharmonic, the Orchestra Sinfonica di Milano, the Deutsche Kammerphilharmonie Bremen, the Vienna Symphony and the Norwegian Radio Orchestra. Previously he has also conducted the Bamberg Symphony, Deutsches Symphonie-Orchester Berlin, Frankfurter Museumsorchester, Deutsches Radio-Sinfonieorchester, Hamburg Symphony, Stuttgarter Philharmonic, Mozarteum Orchester Salzburg, Sinfonieorchester St. Gallen and the Israel Philharmonic among others.
Gamzou founded his own orchestra in 2006, the International Mahler Orchestra (IMO) of players from 25 countries. In 2010, Gamzou garnered further international recognition when his completion of Mahler’s unfinished 10th Symphony was premiered and published by Schott Music. From 2012 to 2015, he was First Kapellmeister and deputy-General Music Director of the Staatstheater Kassel.