Arnold Tukker is a Professor of Industrial Ecology at the Institute of Environmental Sciences (CML) at Leiden University. He coordinates several major research programs in the field of resource efficiency involving collaboration with 20 leading European research institutes. These initiatives include the development of EXIOBASE, the world’s most ambitious and detailed global energy, resource, and economic input-output database and model. From 1 October 2013 to 31 August 2022, Professor Arnold served as Director of the Institute of Environmental Sciences (CML) at Leiden University, dedicating 70% of his time to this role. Prior to this, he was the Business Line Manager for Societal Innovation and Economy at TNO, a major nonprofit research organization in the Netherlands, where he continues to hold a 30% position as a senior researcher. Professor Arnold has played a pivotal role in advancing sustainability research, setting up prominent EU projects such as SusProNet (Sustainable Product Design Network) and SCORE! (Sustainable Consumption and Production). He was also a core member of the Dutch Knowledge Network on Sustainable System Innovations. He has contributed extensively to the work of the United Nations on initiatives such as the Green Economy Initiative, the International Resource Panel, the Ten-Year Framework of Programs on Sustainable Consumption and Production, and the Sustainable Development Goals. Professor Arnold has authored six books, 47 peer-reviewed papers, and seven special issues on sustainability research. He earned his PhD from Tilburg University.