Prof. Dr. Willem van Rhenen holds the Chair of Engagement & Productivity at Nyenrode Business Universiteit. He is the Director of Research and Development of 365 ArboNed BV and since 2010 has been the Ombudsman for PostNL (formerly TNT). Since 2009, Van Rhenen has also been a member of the Dutch Chamber of Social Medicine (Kamer van Sociale Geneeskunde). In addition he has been Chief Medical Officer and member of the Executive Board at 365 B.V. from 2005 to 2013 and has been a member of multiple task groups in the field of social, preventive and occupational medicine. Van Rhenen studied medicine at the University of Amsterdam. In 2008, he obtained his doctoral degree with his dissertation “From stress to engagement”. He is (co-)author of numerous scientific articles.