Dr Michal Drewniok is the Research Associate in Resource Efficiency at the Cambridge University Engineering Department (CUED). His background is civil engineering and he holds a M.Sc. Eng. with PhD in concrete technology from Silesian University of Technology in Gliwice, Poland. During his PhD, he worked on the technological factors which determine the self-compacting concrete formwork pressure. Prior to his current positions, Michal worked as a Site Engineer and Concrete and Production Technologist at Precast Concrete Manufacture. He joined The Resource Efficiency Collective led by Jonathan Cullen, and The Use Less Group led by Julian Allwood in the end of 2015, where he was involved as a Research Assistant in Material Efficiency in Construction on two projects, both centered on making better use of steel in construction. The first explored the barriers to steel reuse, an important potential source of carbon and energy savings. The second project looked at the design process in construction and the role of material efficiency in building conception. In March 2018 he joined the Structures Group and started to work on the project Minimising Energy in Construction (MEICON) led by Dr John Orr. In 2020 Michal worked for the Cambridge Creative Circular Plastics Centre (CirPlas) on use of plastics in the UK. Michal was awarded the EPSRC IAA Postdoctoral Placement at Ramboll UK (Cambridge) on "Relationships between building structural parameters and embodied carbon" and EPSRC IAA Impact Starter Grant on "Post-construction assessment of Energy Cost Metric of the Civil Engineering building in West Cambridge" Since January 2018 Michal is a main coordinator of the Resource Efficiency in Construction and the Built Environment (RECBE), forum for academics, architects, designers, engineers, contractors and policy makers who would like to explore ideas how can the built environment deliver future energy and material services, while at the same time reducing resource use and environmental impact.