Aaron-Casey’s Meisner-trained stage instinct shapes every role he sings. A soloist at Volksoper Wien and beyond, his repertoire includes works spanning from Mozart's Tamino, Nicolai’s Fenton, Donizetti's Nemorino, Strauss' Alfred, and to Orff's Carmina Burana.

He has appeared at the Salzburg Festival, Maison de la Radio et de la Musique in Paris, Festspielhaus Baden-Baden, Jazz at Lincoln Center in New York, and Warner Bros. Studios in Los Angeles.

On screen he appears in director Natalie Jasmine Harris's Pure, an HBO short.