I am Director of the Centre for Resource Efficiency & the Environment, in Civil, Environmental & Geomatic Engineering at University College London, and also Co-Director of CircEL, a UCL-wide research hub for the circular economy. My research is on sustainable technologies, and regulations, policy and other systems, to enable return of wastes to the resource loop. I study industrial wastes to understand physical, chemical and biological processes of accumulation and transformation of contaminants, in relation to waste prevention, treatment and utilisation. Much of my work is in collaboration with industry, and includes laboratory characterisation of materials, development of technologies and test methods, preparation of regulatory guidance documents, evaluation of technologies at field scale, and databases and computer modelling. Before my PhD, I obtained Bachelor’s (1984) and Master’s (1992) degrees in Chemical Engineering from McMaster University. I have more than 30y of research experience gained also at Oxford University, Karlsruhe Institute of Technology, and Environment Canada. I am author of more than 150 publications (WoS H-index = 14), have been on the scientific/organising committee of 15 international conferences.