Marco was involved in television series "Beast Wars: Transformers" (1996) as a production assistant. After completing the syndication of ReBoot's third season he left the Canadian studio to work for Hybride Technologies as CG animator on various productions such as "Spy Kids" (2001) and "Once Upon a Time in Mexico" (2003). Tremblay later rose to lead 3D artist for "Sky Captain and the World of Tomorrow" (2004) before becoming the lead modeler for "Sin City" (2005).