Sebastian graduated Stanford University in 2002 with a major in Journalism, then moved to Los Angeles to work as assistant to legendary B-movie producer Roger Corman. After various entertainment stints (including working as Director's Asst. on "CSI: Crime Scene Investigation"), Sebastian was accepted into USC's Graduate School of Cinematic Arts.

While in Grad School he was twice named a Coca-Cola Refreshing Filmmaker Finalist, and his award-winning graduate thesis "Magellan" went on to screen in over 40 film-festivals internationally. After graduation, Sebastian was named a 2010 Nicholl Fellowship finalist for his comedy script "Drunk-Dialing." Concurrently, he began work as a freelance Commercial and Music Video director, as well as a script writer for hire.