[1] Susman has appeared in over one hundred different television series and commercials and was also featured in the Broadway production of Hairspray, the 1970s films Star Spangled Girl (1971), The Loners (1972), Little Cigars (1973) and California Dreaming (1979).
Susman had supporting roles in the films Only The Strong (1993), Night of the Running Man (1995), Bodily Harm (1995), Just Write (1997), Blast from the Past (1999), High Roller: The Stu Ungar Story (2003), The A Plate (2011) and The Discoverers (2012).
In addition, he appeared in the TV Movies Death Scream (1975), Portrait of an Escort (1980), Thornwell (1981), The Other Victim (1981), City Killer (1984), I Married a Centerfold (1984), The Guardian (1997), The Superagent (2009) and You Don't Know Jack (2010).
In 2012, Susman appeared in the original cast of the off-Broadway Westside Theatre show, "Old Jews Telling Jokes", in which Jessica Shaw of Entertainment Weekly called his portrayal "the funniest moment...delivered with a Yiddish accent as thick as schmaltz".
[8] In 2013, Susman, along with the Old Jews Telling Jokes cast and The Chew personality Carla Hall, appeared at Carnegie Deli to unveil the "OJTJ sandwich", named for the comedy group.