Newton worked as a storyboard artist on 2 Stupid Dogs, The Iron Giant, and Dexter's Laboratory.
He was a character designer on The Iron Giant, The Incredibles, and Ratatouille, all three of which were directed by Brad Bird.
He also co-wrote the short film Jack-Jack Attack and voiced characters in The Incredibles, Ratatouille, WALL-E, and Up.
His directorial debut Day & Night was nominated for Best Animated Short Film Oscar at the 83rd Academy Awards.
[1] By November 2012, Newton was slated to direct an untitled Pixar feature film, with Derek Connolly writing the screenplay.