Geofictician, cartographer, workshop-leader, entrepreneur (advertising), designer and former chairman of the Society for Geofiction. (Genootschap voor Geofictie) Cas has been working with Studio Kessler since 2002, because of the growth of the Studio it became possible to expand the team with a socially inspiring and capable workshopleader/geofictician. In Cas Hofstee, Martijn found exactly what he was looking for, Cas regularly leads and moderates the Geofiction-Workshops. He also functions as a planner in both the creative process of the workshops as well as the design of the ficticious maps. Beside the freelance work for the Studio, Cas has his own Advertising Company.