In the army, he was a member of a Special Forces troop, where he first started developing his love for acting.
After his army service he appeared in numerous productions in Buffalo, and was taught acting at The Studio ARENA Theatre School.
He appeared on Broadway at the Cort Theatre in The Magic Show as Goldfarb.
An Armenian-American, Mardirosian is strongly involved with the Armenian General Benevolent Union (AGBU) within New York City.