He started his career at the Toronto-based Nelvana studio in working on projects like The Care Bears Movie (1985).
Zondag was nominated for Annie Award for Outstanding Individual Achievement for Directing in an Animated Feature Production.
[2] He worked on projects such as Rugrats Go Wild (2003), Home on the Range (2004), Balto III: Wings of Change (2004), Valiant (2005), and Curious George (2006).
Zondag worked as storyboard artist on Ultimate Avengers 2, Flushed Away (2006), The Golden Compass (2007), and Kung Fu Panda (2008).
His most recent credits are the educational TV series Space Racers and the Christian-themed film The Star.