KS Mario Zeffiri has an excellent international reputation as a leading interpreter of the belcanto repertoire and has performed as a guest artist in principal theaters throughout Europe. In Italy these include Teatro alla Scala, Opera di Roma, Teatro Regio di Torino, Teatro Comunale di Bologna , Teatro Comunale di Firenze, Teatro Verdi di Trieste, Teatro Filarmonico di Verona, Teatro La Fenice, and Teatro San Carlo di Napoli.

Outside Italy, he has performed at Opéra National de Paris, at Théâtre des Champs-Elysées and at Opèra Comique de Paris, at Opernhaus Zurich, Gran Teatre de Liceu Barcelona, Deutsche Oper Berlin, Theatre Royal de la Monnaie Bruxelles, as well as in the opera houses of Athens, Bordeaux, Dresden, Düsseldorf, Essen, Frankfurt, Hamburg, Helsinki, Köln, Leipzig, Liège, Montpellier, Nice,Tel Aviv, Santiago, Glasgow, Stocholm,Tallinn, Moscow and St.Petersburg.

His repertoire includes more than 45 titles, and he distinguishes himself especially in such roles as Arturo (I puritani), Ernesto (Don Pasquale), Elvino (La sonnambula), Duca di Mantova (Rigoletto), Tonio (La fille du régiment), Arnold (Guillaume Tell), Fernando (La Favorita), Edgardo (Lucia di Lamermoor), Alfredo (Traviata), Faust (Faust & La Damnation de Faust), Sänger (Rosenkavalier), Narraboth (Salomé).

It is not only on the stages of big opera houses, but also in the classic song and concert domain that Zeffiri’s range is similarly wide: Fluent in five languages that include German Lieder, French melodies, and a large number of classic oratorio parts in his repertory. He was a guest in Festival de Radio France, Salzburg Festival, Wiener Musikverein, Berlin Philharmonic, Carnegie Hall, Chicago Symphony Center, Maggio Musicale Fiorentino, Herodes Atticus Odeon in Athens, Ravenna Festival, Alfredo Kraus Auditorium in Las Palmas, Orquesta Sinfonica del Principado de Asturias, Palau de les Arts Reina Sofía in Valencia and Orchestra Sinfonica G.Verdi di Milano. Mario Zeffiri regularly collaborates with renowned conductors such as Riccardo Muti, Nello Santi, Roberto Abbado, Bertrand de Billy, Daniele Gatti, Gianluigi Gelmetti, Jesus Lopez-Cobos, Helmut Rilling, Stefan Soltesz, Daniel Oren, Eve Queler, Alberto Zedda, and with directors such as Hugo de Ana, Dario Fo, Pier’Alli, Pierluigi Pizzi, Luca Ronconi.

Under the baton of Riccardo Muti, with whom Mario Zeffiri enjoys a long-time collaboration, he performed several titles including Verdi’s Messa da Requiem in Ravenna, Parma, Las Palmas, Montpellier, at the Quirinale Palace of Rome and twice in Chicago. His recording of this great work with the Chicago Symphony Orchestra under Riccardo Muti won two Grammy Awards in 2010 (Best Classical Album & Best Choral Performance). His personal solo CD “Liebesgeschenke” with songs for voice and piano by Franz Liszt and Richard Strauss was recently released and was commended by the Greek Critics Society in 2014.

Mario Zeffiri was awarded the honorary title “Europäischer Kammersänger” in 2015. The following year, in March 2016, he made his debut at the Metropolitan Opera in New York as Roberto Devereux in the homonymous Donizetti opera.

In May 2018 he added yet another role to his repertoire: the role of Pollione in Bellini’s Norma, for his debut at the Croatian National Theatre “Ivan pl. Zajc” in Rijeka.