[2] Knobeloch appeared in several off-Broadway plays, and starred in a touring production of Jesus Christ Superstar.
He played a recurring guest spot as District Attorney Duncan Watts on the television legal drama The Trials of Rosie O'Neill.
Since taking up residency in Australia in 2001, he has appeared in a number of Australian films and television series.
The episode of Australia on Trial in which Knobeloch appeared centred on the Myall Creek massacre, where he played magistrate Robert Scott.
[5] He plays the role of an American father on the Australian television comedy series Superwog.