A graduate of NIDA, Williamson has starred in productions for Sydney Theatre Company, State Theatre of SA, Bell Shakespeare and Ensemble Theatre. Felix is the writer, director of the multi award winning webseries Avalon Now 1 & 2, The Circle and Grey Nomads 1 & 2.

His television credits include Wellmania, Wolf Like Me, Wentworth, Underbelly: Razor, Lost, My Brother Jack, Farscape, Remote Area Nurse, Hawke The Letdown, The Commons, Miss Fisher’s Murder Mysteries, Rake, The Mystery of a Hansom Cab and Mabo.

His feature film credits include Peter Rabbit, The Great Gatsby, Palm Beach, Backyard Ashes, The Thin Red Line, Strange Planet, Nekrotronic, Dirty Deeds and Truth.