Walter investigates the social side of sustainability challenges. As an anthropologist, he translates trends and actions the effects on humans and communties, and can mediate between perspectives of different parties. To further his understanding of social conditions, he travelled the world, from Greenland to Iraq, forming him to be comfortable in a wide range of situations. 

In Greenland Walter was caught by the impact of climate change and the intimate relationship with profound social change. He gained the insight that changing ecological circumstances receive meaning only in their social context. Since then Walter has commited himself to working towards a sustainable society. 

Walter has worked on diverse projects, ranging from researching sustainable mobility, writing a sustainable guide for a dutch supermarket, to campaigning for the integration of sustainability in the Dutch educational system. 

In his spare time Walter is happy to maintain a small roof garden or sails with a self-built raft through the Norwegian fjords.