An active interpreter of opera, art song and new music, Mario Diaz-Moresco is recognized for his versatility and strong stage presence. He studied at the University of Colorado, the University of Southern California, and most recently completed the Professional Studies Diploma program at Mannes The New School. He has been a young artist with Chautauqua Opera, Central City Opera, the Glimmerglass Festival, a Stern Fellow at SongFest, and a Vocal Fellow at the Ravinia Steans Music Institute. Operatic roles include Papageno, Guglielmo, Schaunard, Malatesta, Orfeo, Mercutio, Morales, Sid and William in The Fall of the House of Usher by Philip Glass. In 2019 he sings multiple roles in the New York City Opera production of Stonewall, Papageno in concert with the Dubuque Symphony, recitals with the Chamber Music Festival of Saugatuck, and a recital with the Mendocino Music Festival.

An active recitalist, his repertoire includes works by Schumann, Schubert, Beethoven, Vaughan Williams, Beach, Poulenc, Duparc, Fauré, Ravel, Bolcom, and Musto. In recent seasons, Mr. Diaz-Moresco has given recitals with pianist Spencer Myer on California’s "In Concert Sierra" series, the Dame Myra Hess Memorial Series in Chicago, the Rocky River Chamber Music Society of Ohio, the Chamber Music Festival of Saugatuck and the Brooklyn Art Song Society. In 2018 Mr. Diaz-Moresco was a finalist in the Joy in Singing competition.

Passionate about new music, Mr. Diaz-Moresco has premiered Laura M. Kramer’s song cycle The Miracle of the Walking Fish, for voice and guitar, Julia Adolphe’s opera Sylvia and the song cycle The Wanderlusting of Joseph C., by Joan La Barbara. At the Glimmerglass Festival, he covered the role of Bernard DeVoto in the world premiere of Jeanine Tesori’s opera A Blizzard on Marblehead Neck and is a resident singer for American Opera Projects Composers & the Voice. As a Stern Fellow at SongFest Mr. Diaz-Moresco premiered John and Abigail by Ben Moore and was the baritone soloist in Bernstein’s Songfest in a new arrangement for duo piano and percussion by John Musto.

Recent highlights include Guglielmo in Così fan tutte, the lead role in Robert Ashley’s Dust, named one of the best classical music performances of 2017 by The New York Times, and the baritone lead in Philip Glass’s Hydrogen Jukebox at Chautauqua Opera. Recitals and concerts include a second appearance with the Dame Myra Hess Memorial Series in Chicago, the Philadelphia Orchestra's concert version of West Side Story, numerous appearances with the Brooklyn Art Song Society and a performance of The Wanderlusting of Joseph C. at the Metropolitan Museum of Art. Mr. Diaz- Moresco is a student of Diana Soviero.