Gaston Rivero's professional debut came in 2003 with the Broadway production of Puccini’s La Bohème, in New York City, by Australian film director and producer Baz Luhrman.
In the 2014/2015 season he can be heard at the Opera Leipzig as Cavaradossi, Des Grieux, Pinkerton and Ismaele. In the same season he will sing Macduff at the Oper unter den Linden, as well as the role of Rodolfo (Luisa Miller) in Essen and Stuttgart.
In November 2013 he gave his debut in a NP of Il trovatore at the Berlin Staatsoper in the role of Manrico under the baton of Daniel Barenboim.
Other company credits include Manrico in Il Trovatore and the tile role in Don Carlo at the Staatsoper Berlin; Mario Cavaradossi in Tosca and Alfredo in La Traviata at Oper Leipzig, Don Jose in Carmen and Rodolfo in La Boheme at the Deutsche Oper Berlin; Don Jose in Carmen at the New National Theater Tokyo; Manrico in Il Trovatore at the Grand Theatre Opera National de Bordeaux; the Singer in Der Rosenkavalier at Grand Théâtre de Genève; Des Grieux in Manon Lescaut at the Hungarian State Opera Budapest; Ismaele in Nabucco at Teatro Massimo di Palermo; the title role in Don Carlo at the Teatr Wielki Opera Narodowa; Des Grieux in Manon Lescaut at Oper Graz; Alfredo in La Traviata with Palm Beach Opera; Macduff in Macbeth and Turiddu in Cavalleria Rusticana at the Teatro Solis de Montevideo; Romeo in Romeo et Juliette with PORTOpera and Flaminio in L’amore dei Tre Re with Opera Orchestra of New York.
Gaston Rivero made his Carnegie Hall debut in 2002. His frequent appearances at Carnegie Hall have included Mozart's Vesperae Solennes de Confesore; Ariel Ramírez's Misa Criolla and several roles with Opera Orchestra of New York.