Seth is the co-founder and Executive Director of the Chicago-based organization Accessible Contemporary Music, which exists to promote the music of living composers. While under his leadership ACM started many of its signature programs like Weekly Readings, Sound of Silent Film, Composer Alive, the ACM School of Music and the High School Composers Workshop, and he has been instrumental in growing the audience for ACM’s live events. He is the co-producer of the 55-minute documentary film Composer Alive: Eastern Expressions and also wrote music for the film and appears in it. The film has been shown on Chicago's PBS affiliate station and has been screened publicly in Chicago, at Stanford University as part of their Pan-Asian Festival, and at other festivals around the country.

As an advocate of new music, Seth is a regular guest on radio stations WFMT, WGN and WBEZ Chicago Public Radio. He also currently hosts the radio show Relevant Tones on WLUW which features music of contemporary composers.

Currently Seth teaches piano and composition at the ACM School of Music in Chicago's Ravenswood neighborhood and teaches the High School Composer’s Workshop at Roosevelt University.

When not composing, practicing or obsessing about contemporary music, he can often be found surreptitiously reading US magazine in the checkout line at the supermarket.