Frith relocated to the United States in 1997 to become Composer-in-Residence at Mills College in Oakland, California. In 1999 he was appointed the Luther B. Marchant Professor of Composition in the Music Department at Mills, where he currently teaches composition, contemporary performance, and improvisation. While he had never studied music in college, Frith's credentials of over forty years of continuous practice and self-discovery got him the position. He has, however, maintained that "most of my students are better qualified to teach composition than I am," and that he learns as much from them as they learn from him.