Stef Lemmens is Assistant Professor at the Technology and Operations Management department at RSM. His current research focuses on designing and modeling sustainable supply chains, more specifically humanitarian and closed-loop supply chains. He relies on queueing networks, mixed integer programming and dynamic programming to analyze and improve their performance. His work is practice-based and in collaboration with companies in the consumer electronics and biopharmaceutical industry. He published several academic papers in scientific journals, including Manufacturing & Service Operations Management, European Journal of Operational Research, and Chemical Engineering Research and Design. Before joining RSM, Stef obtained his PhD in Applied Economics at KU Leuven (Belgium) and worked as a postdoctoral researcher at INSEAD’s Technology and Operations Management (France).