Jan Jonker is a professor at the Nijmegen School of Management (NSM) of the Radboud University Nijmegen [Holland]. He holds the chair of ‘Sustainable Entrepreneurship’. His research focus is on management and corporate social responsibility (CSR) and sustainable development (SD) in particular the development of business models and strategy. Within this focus he concentrates often on how to organise change and transformation. In recent years he as concentrated on the circular economy.