Sebastian graduated Stanford University 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 Film School.
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 Finalist for his comedy script "DRUNK-DIALING." After working several years as a freelance Commercial and Music Video director, Sebastian joined Mattel in 2022 as a Creative Lead for Digital Video. Most recently, his children’s fantasy script “ROY G. BIV” won best feature screenplay at the 2023 Austin Film Festival.