 Glen began his acting career in 1986 in various theatre productions in Canada and in the United Kingdom, where he still continues to act in theatre too this day.Outside of acting in theatre, he also works extensivly as a voice actor in various anime and animated television shows and films, such as "", "Dangaioh", "Hyper Combat Unit Dangaioh", "Gunnm", "" and it's sequel, "Blazing Dragons", "Flying Rhino Junior High", "Undergrads", "Angela Anaconda", "Rescue Heroes", "" and "RoboRoach".In 2000, Glen became the voice of Thomas the Tank Engine in Britt Allcroft's fantasy film "Thomas and the Magic Railroad", replacing John Bellis in the final cut of the film.