Marty was an assistant of Dr. F. Corman.
Marty worked at the St. James Medical Center in Plainville as an assistant to F. Corman. To his shock, F. Corman eventually died of alcoholic consumption despite being dry for the past 20 years.
He was soon visited by Dean and Castiel, who wanted to see with Corman. Marty relayed the sad news. When Castiel mentioned it was Famine's doing, Marty was confused, but agreed to leave the room when instructed.