Jonathan Kimmel worked as a staff writer from April 2004 until November 2008. He was a post-production assistant for two episodes during 1998. His alias was Juan Kimmelini and John Smith when providing small voice over roles, and was credited as such. He is the younger brother of talk show host Jimmy Kimmel.
Voices on South Park
- "Best Friends Forever" - an angel.
- "The Losing Edge" - Alan Varcas.
- "Follow That Egg!" - Jakartha the assassin.
- "Cartoon Wars Part I" - Peter Griffin.
- "Cartoon Wars Part II" - Peter Griffin.
- "Go God Go" - United Atheist League member.
- "Go God Go XII" - an actor in the Crank Prank Time Phone commercial.
- "Night of the Living Homeless" - homeless men asking for change.
- "Imaginationland, Episode II" - Ork.
- "Imaginationland, Episode III" - a gladiator.
- "Fishsticks" - Jimmy Kimmel.