At the Hungarian State Opera, István Kovács has played such roles as Walter, Raimondo, Sarastro, Bluebeard and Don Giovanni.
He has also taken the stage as a guest artist at Staatsoper Berlin as well as the opera houses of Frankfurt, Turin, Palermo, Nice, Bordeaux and Toulouse. As an oratorio singer, he has appeared with orchestras like Leipzig’s Gewandhaus Orchestra, the Internationale Bachakademie Stuttgart, the Israel Symphony Orchestra and the New Japan Philharmonic.