Tomás is known for his "... gorgeous, mellifluous, pure tone (New York Classical Review)," as well as his stylistic flexibility. A regular in the new music and choral scene, he has performed new operas and concert works by Steve Reich, Judd Greenstein, Evan Ziporyn, Ted Hearne, Missy Mazzoli, Giacinto Scelsi, Salvatore Sciarrino, Aaron Cassidy, Neil Rolnick, Anthony Braxton, Pulitzer Prize-winning Du Yun, Jason Cady, Petr Kotik, and Matt Marks, among others. Recently, Tomás played the role of Harry Balter in the tour of Toshi Reagon's operatic adaptation of the Octavia Butler novel Parable of the Sower. Other credits include the world tour of Philip Glass and Robert Wilson’s opera, Einstein On The Beach, SNL, Damien Rice, Helga Davis’ classic soul showcase The Love Show, pop a cappella group Duwende, and experimental ensemble Ekméles. He has recorded for Nickelodeon (Duwende), Matthew Schickele, Chris Cerrone, jazz composers Matthew Sheens, Yelena Eckemoff, and Eric Johnsen, and has performed/recorded for live art and dance works by Martin Creed, Andrea Galvani, Miguel Gutierrez, Amber Sloan and Jane Benson.
Ongoing projects include a cappella group Duwende, indie-pop band Secret Sibling, Naboréa by jazz vocalist/composer Kavita Shah, Early Music New York's Christmas concert series, vocal jazz group West Side 5, and singing in the Marble Collegiate Choir.
Recently, Duwende made its first tour to Japan (Tokyo and Osaka). Parable of the Sower toured in New York, Philadelphia, Amsterdam, Singapore, Abu Dhabi, and more. Tomás also participated in a workshop of Heather Christian's new theater work SUM, and a reading of David Lang's choral opera True Pearl.