In 2005, Marshall-Green appeared in the film "Alchemy". That same year he also appeared in the Miramax film "The Great Raid". Marshall-Green portrayed Tyler Fog in the 2007 ABC series "Traveler". He appeared as Paco in the 2007 film "Across the Universe". He featured as Dean Bendis, an undercover police officer, in a black ops group of the LAPD headed by Dylan McDermott in the TNT series "Dark Blue". He played a young rookie cop the 2010 criminal drama "Brooklyn's Finest" directed by Antoine Fuqua, and had a lead role in the horror film "Devil".