Martijn Rietbergen (Ph.D.) is an associate at the Institute for European Energy and Climate Policy and senior lecturer, researcher and project manager at the HU University of Applied Sciences Utrecht, where he is affiliated with the Centre of Expertise Smart Sustainable Cities, the research group on Applied Urban Energy and the Institute for Design and Engineering. He is experienced in developing, coordinating and teaching educational programmes in the field of sustainable development, including a one semester international course on smart sustainable cities. His research focuses on topics such as energy efficiency, policy evaluation and programme design, smart urban mobility and circular economies. He is also actively developing, co-ordinating and executing innovative international projects in the triangle of research, education and professional practice on various topics of sustainable development.