Marcus has acted for Disney, Stan, Amazon, NBC, Seven Bucks, Opera Queensland, Queensland Music Festival, Hive Collective Metro Arts, Playlab, Room to Play, Big Scary Animal and Empire Theatres.

Marcus is a respected Australian voice and text coach, and Patsy Rodenburg Associate, trained by Patsy Rodenburg OBE since 2018.​  He has an international clientele of artistic, education and corporate clients who work with him to master the art of sustainable and impactful voice work.​

Marcus has voiced campaigns for national and international brands and organisations, including Warner Bros Movie World, Village Roadshow, news.com, Telstra, Dairy Farmers, SWYFTX, Quon, UD Trucks, The Queensland Government, and more.