Sebastian is a Polish-British born writer based between London and Poland. He began his career working for producers, directors and writers on a diverse range of film and television projects, including ETERNALS, WILLOW, MURDER ON THE ORIENT EXPRESS, LONDON HAS FALLEN, THE IMITATION GAME, RUSH, THE FOREIGNER, and BEFORE I GO TO SLEEP.

His scripted experience includes working as a writer’s room script coordinator on SPIDER-MAN: FAR FROM HOME, CONSTANTINE, THE MARVELS, AND ALI G: WHO IZ I? before moving into script editing on BAND OF SPIES and the MOBLAND series. He is currently working in the MobLand writers’ room, contributing creatively to seasons three and four.

Sebastian is developing several film and high-end television projects – largely true-to-life adaptations – with producers and writers. His screenwriting accolades include the Grand Prize at the Finish Line competition, and since he has developed relationships with executives at 101 Studios, Marvel, Paramount, Lucasfilm, HBO and Archery Pictures.