His first professional on-stage appearance was a year later, in George M. Cohan's The Tavern, the debut production of Capital Repertory Theatre.

[4][5][6] He appeared as a regular in The 100 Lives of Black Jack Savage, Hardball, and Working, in several episodes of Roswell, and also in occasional episodes of CSI: Crime Scene Investigation; one episode of Friends; and in The King of Queens, Two and a Half Men, Dharma & Greg, The X-Files, Lois & Clark: The New Adventures of Superman, That's So Raven, George Lopez, The Bill Engvall Show, The Jeff Foxworthy Show as Craig Lesko, and Mike & Molly.

He performed in the Disney Channel Original Series The Suite Life of Zack & Cody as Herman Spatz, in Good Luck Charlie as Marvin the bellman, and in Sonny with a Chance as Murphy the troublesome security guard.

[7] As Joseph the coroner, Hytner is one of two actors (the other being Christopher Walken) to appear in each of the first three films of The Prophecy series.

He appears in the 2006 comedy film Bachelor Party Vegas and reprised his role as Kenny Bania on the fictional Seinfeld reunion table read on Curb Your Enthusiasm in 2009.