David Baas was the head of the animation department at Arc Productions, which he joined in 2005. He directed Thomas and Friends for the seventeenth season only. He also directs the CGI television series "Matt Hatter Chronicles". He also directed Shane Acker's "9" for Arc Productions. Prior to joining Arc Productions, he worked as a coordinator and professor in the computer animation program at Seneca College, Canada. Rob Silvestri directed King of the Railway and Tale of the Brave, while Don Spencer directed half of the eighteenth season and David Stoten directed the other half.
He left Arc Productions in 2014 and Adam Beck is now the head of animation.