Simon Victor Linsteadt is a composer and audiovisual artist based in Los Angeles. He has composed over two dozen pieces for This American Life along with music for chamber ensemble, film/TV, and performance art.

In 2025 Simon created the music and sound design studio Ionic Order (clients have included Ray-Ban, Meta, and The New York Times).

Since 2015 he has released five albums and several EPs spanning American folk, pop, and electronica. He is also an avid filmmaker, often wielding his Bolex camera along for the ride.