Janez Lotric began studying singing at the Ljubljana Conservatory and subsequently took specialization classes with Hilde Zadek in Vienna and with Mario del Monaco. He began his career in Slovenia, Croatia, the Czech Republic, Slovakia and Germany and subsequently he was noticed by Lutz Hochstraate during his interpretation of Bacchus in Ariadne auf Naxos di Strauss.
In 1995 Hochstraate signed him for Carmen in the role of Don José and in Cavalleria rusticana as Turiddu, at the Salzburg Theatre. In June 1996 he made his debut at the Staatsoper in Vienna in Pagliacci and, in the same year, he exhibited in Turandot at the Vienna Staatsoper and in La Bohème at the Graz Opera. Also, he was protagonist of Les Contes d'Hoffmann by Offenbach at the Opéra Comique in Paris, he sang in Carmen at the Hamburg Opera and in Turandot in Copenhagen. He then returned as the protagonist of Ariadne auf Naxos and Il Trovatore at the Vienna Staatsoper where he also sang in Le Prophète, Cavalleria rusticana, Pagliacci and I Vespri siciliani. In 2000 he performed at the Opéra-Bastille in Les Contes d'Hoffmann, Il Trovatore and Ernani; she sang in Ariadne auf Naxos in Japan with the Vienna Opera, in Il Trovatore at the Zurich Opera and in Rome, in La Forza del destino at the Deutsche Oper in Berlin and in Turandot at the Royal Opera House Covent Garden. During 2003 he performed in Tokyo in Turandot, at the Opéra National de Paris in Guillaume Tell, in Athens in I Vespri siciliani and at the New National Theatre of Tokyo in Les Contes d'Hoffmann. His future engagements include performances in the Finnish National Opera House in Helsinki, in the Opera House in Montecarlo and in the Metropolitan Opera in New York.