 Stewart is a founding member of the Bang on a Can All-Stars band and The Jerry Wortman Nonette.Also, he has worked with Paul Simon, Anthony Braxton, Bob Dylan, Cecil Taylor, Meredith Monk, Philip Glass, Bruce Springsteen, Edie Brickell, Don Byron, Paul McCartney, Marc Ribot, and in the duo Polygraph Lounge with Rob Schwimmer, with whom he also contributed to Simon & Garfunkel's "" reunion concert tour.He plays many experimental and lesser-used instruments, such as the daxophone and theremin.