Johan De Greef graduated in 2000 as a MSc in Bioscience Engineering (VUB, Belgium, 2000) with a major in process and environmental technology. He obtained a PhD in Chemical Engineering (VUB, Belgium). Throughout his doctoral research and teaching, he developed a profound knowledge regarding the design and optimization of reactor and process systems. From 2005 until 2018, Johan worked for an international technology and engineering company. Initially, he was involved in technical design, cost calculation and contract negotiations for new-to-build thermal waste treatment plants worldwide. In 2010, he became the head of research and technological development. In this position, he dealt intensively with issues regarding fouling, corrosion and process control optimization in Waste-to-Energy plants during start-up, commissioning and thereafter. He was also involved in applied R&D projects in collaboration with academia. Since 2016, Johan is leading member of the supervisory board of PREWIN (www.prewin.eu), Europe’s leading network in the field of Waste-to-Energy, bringing together plant operators, technology suppliers and research institutes, in support of technological development. Johan is appointed associate professor at KU Leuven since 01/01/2020. His research focus is on thermochemical reactor and process engineering, and (in-line) control of partitioning and speciation phenomena related to inorganic elements and compounds in waste and contaminated biomass, in particular.