Mezue ahịrịokwu na-esonụ: Onye otu nke Screen Actors Guild, AFTRA, na Actors' Equity, Marshall apụtawo na ọrụ ndị dị mkpa na ọtụtụ ọrụ, gụnyere Captain
Richard Phillips na "Somali Pirate Takedown: The Real Story" maka Discovery Channel. Ọrụ ndị ọzọ na-eduga gụnyere FDNY Captain Jay Jonas na Emmy Award-nominated "Countdown to Ground Zero" maka History Channel na ọrụ na-aga n'ihu dị ka John Zaffis na "A Haunting" maka Discovery Channel. Ọrụ ogbo gụnyere ma Off-Broadway na Baltimore Hippodrome mmepụta nke Ken Davenport's hit interactive comedy "The Awesome 80s Prom" dị ka onye isi nchịkwa Snelgrove. Marshall bụkwa onye otu Dramatists Guild, na ihe nkiri ya "41N 50W" nwere ụwa mbụ ya n'ọnwa Ọktoba 2012 na London St. James Theatre.