Simon Victor Linsteadt is a composer and multi-instrumentalist based in Los Angeles. He has composed music for concert, screen, and performance art, and released numerous albums as a singer-songwriter. He regularly composes music for This American Life, having written over thirty pieces for the show.

As a composer and sound artist he collaborates frequently with the aerial dancer and multi-disciplinary artist Helen Wicks. Their pieces have premiered at Z Space Theater, Fort Mason San Francisco Aerial Festival, San Francisco International Arts Festival, and ODC.

Linsteadt began his career touring and making albums as a singer-songwriter and the frontman of Bay Area bluegrass band Steep Ravine. He has performed at such venues as The Fillmore, The Great American Music Hall, Strawberry Music Festival, The Freight and Salvage, and many more.