Keller is an award-winning composer and guitarist. His music explores the myriad of possibilities found in the coexistence, inter-mingling and hybridity between contemporary concert music, jazz and rock. Keller has received commissions from John Zorn (Tzadik), the Empyrean Ensemble (UC Davis), Fondation Royaumont, Redfish-BlueFish, NOISE, the Cantoria Choir (Truman State University), Cappella Gloriana, the Athens Master Chorale, Mark Menzies (violin), and Morris Palter (percussion). His music has been performed in the Americas, Europe, and Australia, and at notable festivals such as June in Buffalo, SoundOn (La Jolla, CA), and FeNAM (CSUS).

In addition to being a composer, Keller is an accomplished guitarist. He has won and placed in numerous state, regional, and national competitions and has performed in notable master classes, such as those with Christopher Parkening. With his own ensemble, he has performed at music festivals, including Festival of New American Music (2013, 12, 07), In The Flow (2006, 08, 11), and the 2007 SRING festival of New Music at the University of California, San Diego. 

Keller’s music is available on the Tzadik and Centaur labels. He holds a PhD in music composition from the University of California, San Diego (2004).