A one-time student of Guy Maddin, he first worked with the director as an additional camera operator in "My Winnipeg" (2007), presented at the 32nd Mostra. In "The Forbidden Room" (2015), presented at the 39th Mostra and his feature film directing debut, he also served as screenwriter, visual effects supervisor, and assistant editor. Johnson also directed "The Green Fog" (2017), presented at the 42nd Mostra.