Mario Diaz de Leon is a composer and performer, whose output encompasses modern classical music, experimental electronic music, and extreme metal.  

His debut album as composer, "Enter Houses Of" was released in 2009 on John Zorn's Tzadik label, and praised by the New York Times for its "hallucinatory intensity".  A second album, entitled "The Soul is the Arena", was released in 2015 on the Denovali label, and was named a notable recording of 2015 by New Yorker Magazine.  Pitchfork wrote that the album "combined his interests seamlessly into music that throbs with snarling exuberance."

Recent performances at Walt Disney Concert Hall, Donaufestival (Austria), CTM Festival (Berlin), Chicago Symphony Center, Hakuju Hall (Tokyo), Venice Biennale, Lucerne Festival (Switzerland), Musica Nova Helsinki, National Gallery of Art (DC), Ojai (California), and Roulette (Brooklyn), and commissions from the Los Angeles Philharmonic, International Contemporary Ensemble (ICE), Talea, and Chamber Music America. 

From 2012-2016, his solo electronic project Oneirogen (o-NI-ro-jen) toured internationally and released three full length LPs and two EPs on the Denovali label.  Since 2015, he leads the metal band Luminous Vault as vocalist and guitarist (Profound Lore Records).  

Born in Minnesota in 1979, he grew up playing guitar in hardcore punk and metal bands before attending the Oberlin Conservatory of Music, where he studied electronic music and composition.  He has lived in in New York City since 2004, and received his doctorate in music composition from Columbia University in 2013, where he was appointed Core Lecturer in Music Humanities.  His mentors include George Lewis, Maryanne Amacher, and Iancu Dumitrescu.