[1][2] Together with Geoffrey Lewis in 1970, he created Celestial Navigations, a storytelling group, that produced 8 albums, several made the Billboard (New Age) charts.

He co-composed and co-produced "The Janitor", an Academy Award-nominated animated short based on a story by Geoffrey Lewis from the album Celestial Navigations.

[3][4][5] Levin has scored over 40 full-length films and has created music used in many TV shows including The Sopranos, Chicago Fire, The Good Wife, Friends, Bloodline, SNL, Game of Thrones, Friday Night Lights, CSI, and Weeds.

[10] He performed regularly at Offstage, a folk club in San Jose founded by Paul Foster that later hosted artists including the Grateful Dead, Jefferson Airplane, Quicksilver Messenger Service, Jorma Kaukonen, Paul Kantner, Jerry Garcia[11][12] David Freiberg and David Crosby, Odetta, Jesse Fuller, The Albin Brothers (members of Janis Joplin's band) and Malvina Reynolds.

[16][17] Levin and Thaïs performed the single off the album Tusks & Horns at the Global March for Elephants & Rhinos on October 4, 2014.