Projects in 2025 and 2026 include his debut as Scarpia in Tosca at Staatsoper Hannover, his return to Teatro Comunale di Bologna as Jake Wallace in La fanciulla del West, and his return to the Orchestre Symphonique de Montréal to sing Guglielmo in Così fan tutte. In Bern he sings Don Carlos in La forza del destino and returns to Japan for a Beethoven Ninth Symphony tour with concerts in Tokyo, Osaka, and Hyogo. He reunites with the LA Phil to sing Estévez’s Cantata Criolla.

Recent appearances include his debut as Giorgio Germont in La traviata at the New National Theater in Tokyo and as Amonasro in Aida at Teatro Coccia in Novara, Italy. He also debuted Jake Wallace at the Teatro Regio Torino, Mercutio in Roméo et Juliette at the Teatro Petruzzelli in Bari, Lescaut in Manon Lescaut and Renato in Un ballo in maschera at the Stadttheater Klagenfurt, and Guido di Monforte in I vespri siciliani at Teatro Comunale di Bologna. He also sang Ginastera’s Estancia with the LA Phil under the baton of Gustavo Dudamel at Walt Disney Concert Hall, Carnegie Hall, and Teatro Mayor in Bogotá. He has appeared as Figaro in Il barbiere di Siviglia at La Scala and as Foscari in Il bravo by Mercadante at Wexford Festival Opera.

In concert Castillo sang Estévez’s Cantata Criolla with the Boston Symphony and Cincinnati Symphony orchestras.

After his debut as Schaunard in La bohème at the age of 25, performances as Sharpless in Madama Butterfly, Sacristan in Tosca, and Belcore in L’elisir d’amore followed.