[3][4] His roles include Philip II in Verdi's Don Carlos, Sarastro in Mozart's The Magic Flute, Colline in Puccini's La Bohème, Raimondo in Donizetti's Lucia di Lammermoor, Massimiliano Moor in Verdi's I masnadieri, the Commendatore in Mozart's Don Giovanni, and as his first Wagner roles Fafner in Das Rheingold and Siegfried, and Hunding in Die Walküre.

The same year, Kares made guest appearances in Helsinki (as Teller in John Adams' Doctor Atomic), in Oviedo (as Sarastro) and at the Palau de les Arts Reina Sofía in Valencia, as Angelotti in Puccini's Tosca, second prisoner and Don Fernando in Beethoven's Fidelio and Truffaldino in Ariadne auf Naxos by Richard Strauss.

In 2013, he first performed at the Royal Opera of Versailles, as Daland in Wagner's Der fliegende Holländer with Les Musiciens du Louvre conducted by Marc Minkowski.

In March 2014, he sang both the Commendatore and Masetto in Don Giovanni, in Nikolaus Harnoncourt's concert Da Ponte cycle at the Theater an der Wien.

[4] Kares has also made guest appearances in Hong Kong, Vienna, Paris, and Rome, sang with conductors such as Lorin Maazel and Zubin Mehta, and was a cover at the Metropolitan Opera in New York City.