He is the founder and artistic director of the Club Foot Orchestra, an important modern ensemble for live music performance with silent films.

Marriott was a member of Snakefinger's History of the Blues[1] and has recorded with The Residents,[2] Brazilian Girls,[3] "Singer at Large" Johnny J. Blair, and many others.

Composing credits also include music for the feature film Rising Sun,[4] music for the CBS series The Twisted Tales of Felix the Cat, the score for the 1988 Academy Award nominated short film Silver into Gold and the score for Legong: Dance of the Virgins commissioned by Gamelan Sekar Jaya and composed for Balinese gamelan and Western instrumentation.

A collaboration with Beijing-based librettist Xu Ying, entitled Prince Lan Ling, is scored for Western Symphonic Orchestra, Chinese instruments and singers, chorus and dancers.

The Klezmorim Bass Concerto premiered in 2018 with soloist Gary Karr and the Gonzaga University Orchestra, conducted by Kevin Hekmatpanah.