Marton became an actor in 1989 after graduating from the New Zealand Drama School. His first movie role was in the 1994 movie Jack Brown Genius (1996) in which he played the role of Dennis. After starring for 2 years in the New Zealand soap opera "Shortland Street" (1992), he starred in the 1996 movie Broken English (1996) as Darko.
His talent for classical work was seen in numerous productions, including the Shakespearen roles of Falstaff in The Merry Wives of Windsor, Brutus in Julius Caesar and Orsino in the romantic comedy Twelfth Night, as well as performing in Chekhov's Three Sisters, The Cherry Orchard and Bertolt Brecht's Happy End. After performing in a great number of theatrical plays, writing his own and co-founding his own theatre company, the Stronghold Theatre, Marton got the role of Tarlus in an episode of "Hercules: The Legendary Journeys" (1995). After that, he continued working with Renaissance Pictures, playing the roles of Khrafstar and Borias in the 1997-1998 seasons of "Xena: Warrior Princess" (1995). He continued appearing in many other shows in both NZ and Australia, such as "Farscape" (1999), "BeastMaster" (1999), "Water Rats" (1996), "Cleopatra 2525" (2000), and more, returning for the role of Borias in three episodes of the 2000-2001 season of "Xena: Warrior Princess" (1995). He was also in many movies produced in NZ and Australia, such as Hurrah (1998), The Monkey's Mask (2000) and the mini-series "The Farm" (2001).