Dillenburg only has a handful of credits, and all of them are from TV shows. He made his acting debut as an officer on Law & Order, and we didn't see Dillenburg in anything else for four years until he appeared as a cop again in the show Elementary, starring Jonny Lee Miller and Lucy Liu.
He continued his man-in-uniform tour as an armed guard on Person of Interest. After that, he played a detective on Blue Bloods, a show that another Oitnb character also appeared in.
Following his longstanding role on Oitnb, Dillenburg appeared in the 2017 short The Bracket Theory (and actually