Schrab and long-time writing partner Dan Harmon wrote the 2006 feature film Monster House, along with Pamela Pettler. They wrote the film based on a pitch they had originally made in 1998. It was Harmon and Schrab's first feature deal and launched their career in the movie Business. He continued to collaborate with Dan Harmon, directing multiple episodes of Community.
Schrab was to mark his feature directorial debut with The Lego Movie Sequel but he left the project in February 2017. He was replaced by Mike Mitchell as Director in same month.
