Jonathan Cullen (Group Leader)

Jonathan is the University Lecturer in Energy, Transport and Urban Infrastructure at the University of Cambridge and a Fellow of Fitzwilliam College. He studied Chemical and Process Engineering at the Univerisity of Canterbury, New Zealand. After 10 years working in industry and in development work in Peru, he moved to Cambridge for the MPhil in Engineering for Sustainable Development, then completed a PhD on the Engineering Fundamentals of Energy Efficiency, before taking up roles of Research Associate and then University Lecturer.

Karla Cervantes Barrón (PhD Student)

Karla has a Bachelors’ degree in Chemical Engineering from the National Autonomous University of Mexico (UNAM). Karla’s professional experiences before the PhD included working for the non-alcoholic beverage industry in Mexico in the areas of quality, environment protection and  operations management. Overall, she has managed samples and information from production plants, performed budget analysis, and coordinated and reported environmental information. Karla’s PhD is about the level of energy services used in different countries.

Charalampos (Harry) Michalakakis (PhD Student)

Harry graduated from University College London with a 1st class honours MEng in Chemical Engineering with a dissertation on modelling the use of CO2 in enhanced oil recovery. He completed an MPhil in Energy Technologies at the University of Cambridge with a masters thesis on resource efficiency in ammonia production. He is continuing this research as a PhD student looking at methodologies of identifying resource savings in the chemical industry. Twitter account


Ana Morgado (PhD Student)

Ana has a Master’s in Chemical Engineering – Energy and Environment from the Faculty of Engineering of the University of Porto (FEUP), having conducted her Master’s thesis project at the Biofluids & Transport Group, in Imperial College London. After finishing her Masters, Ana worked as a research assistant at the Transport Phenomena Research Centre at FEUP, focusing on numerical and experimental studies on gas-liquid slug flow applied to oil extraction in pre-salt regions. In 2019, she completed an MPhil in Chemical Engineering and Biotechnology from the University of Cambridge, studying the impacts of heat transport due to increasing Arctic temperatures on the destabilisation of methane hydrates reservoirs within permafrost. Ana’s PhD topic reflects her long-term interest in low-carbon transition, looking at ways to reduce industrial emissions through resource efficiency improvements.


Samantha Islam (PhD Student)

Samantha is currently pursuing her PhD on efficiency improvement in food supply chains via traceability under Commonwealth scholarship. She undertook a research-Masters on Sustainable Manufacturing from Monash University, Australia and a Bachelor on Industrial and Production Engineering from BUET, Bangladesh. Samantha worked as a Quality assurance officer at the Department of Supply Chain at Save the Children. Before coming to Cambridge, she pursued another research position at UNSW based in Australian Defense Force Academy for a year.

Michał Drewniok (Postdoctoral Research Associate)

Michal is a Research Associate in Material Efficiency in Construction at the Department of Engineering, University of Cambridge. His background is civil engineering and he holds a M.Sc. Eng. with PhD in concrete technology pending 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 position, Michal worked as a Site Engineer and Concrete and Production Technologist at Precast Concrete Manufacture.

Cyrille Dunant (Postdoctoral Research Associate)

Dr Dunant holds a PhD in Material science. His background in concrete durability has led him to develop an interest in design and efficient use of materials. He is now currently working on two projects, both centred on making better use of steel in construction. The first explores the barriers to steel reuse, an important potential source of carbon and energy savings. The second project looks at the design process in construction and the role of material efficiency in building conception.


José Azevedo (Research Associate)

José is mapping the flows of resources in the UK supply chain and developing a solid-state welding process based on metal powder. This work is part of the UK FIRES programme. He completed his PhD in the Use Less Group in 2019, which was sponsored by Tata Steel UK. In his PhD, José developed a welding rig that reduced the time required to produce solid-state welds with metal powder from hours to minutes and also mapped the global material and energy flows of powder metallurgy. José has a Mechanical Engineering degree from the University of Porto and joined Resource Efficiency Collective in 2019.


Robert Flicker (Research Assistant)

Robert is a Research Assistant researching carbon clarity in the global petrochemical supply chain. He studied Chemical and Process Engineering at the University of Western Australia. Robert has over five years of experience consulting in the energy and resources sector and working with the Australian Federal Government to improve supply chain policy. In 2020 Robert completed the MPhil in Engineering for Sustainable Development at the University of Cambridge and is applying for a PhD with Resource Efficiency Collective focusing on investigating emissions transparency in the petrochemical supply chain.

Past People


Jennifer Bitting (PhD Student)

Jennifer is researching a resource efficient means of obtaining sustainable water supply for California’s Central Coast. She has a BS in Environmental Engineering from California Polytechnic State University, San Luis Obispo and an MPhil in Engineering for Sustainable Development from Cambridge University. Jennifer is a registered professional civil engineer (PE) in the state of California. She worked for the California Central Coast Regional Water Quality Control Board for 7 years as Storm Water Program Manager.

Matteo Craglia (PhD Student)

Matteo graduated with a 1st class honours in mechanical engineering (BAI) from Trinity College Dublin and subsequently completed an MPhil in Energy Technologies in Cambridge in 2016. Matteo’s PhD research focuses on energy efficiency in the rapidly evolving transportation sector and aims to assess how much engineering efficiency improvements in vehicles lead to real energy savings. Matteo is funded by the UK Engineering and Physical Research Council (EPSRC).

Leonardo Paoli (PhD Student)

Leonardo graduated as a mechanical engineer from Imperial College London in 2014. During his undergraduate studies he conducted research on sustainability related topics such as sustainable transport policy and Life Cycle Assessment (LCA) of a hybrid concentrated solar power plant. After his graduation he worked as a Trainee for the European Commission in the Directorate General for Research and Innovation. Leonardo’s PhD aims to build an Ashby-type map for energy efficiency of conversion devices relating energy efficiency and cost to other physical variables.

Shobhan Dhir (Research Assistant)

Shobhan graduated with a first class honours degree in Mechanical Engineering from the University of Newcastle before completing an MPhil in Energy Technologies at the University of Cambridge. In collaboration with Emerson Electric, Shobhan worked to optimise the presentation of visual interfaces (such as Sankey diagrams) for resource efficiency analysis. Shobhan is now completing a DPhil in novel battery chemistries at the University of Oxford.

Ana Gonzalez Hernandez (PhD Student)

Ana graduated with a first class honours  MEng in Mechanical Engineering from Imperial College London in July 2014. Shortly after, in October 2014, she started her PhD in the University of Cambridge in collaboration with Emerson Electric. The aim of her PhD is to evaluate the potential of coupling the use of Sankey diagrams for energy and material flow analysis to site-level process analysis in a factory. Data collected from installed process control systems will be used to perform thermodynamic analyses on the site’s process streams.


Peter G. Levi (PhD Student)

Peter graduated with a first class honours degree in Civil Engineering (MEng) from the University of Bristol, having spent a year studying abroad at the University of California at Davis. He then went to work in industry as an engineering consultant for two years, before pursuing post-graduate study. Peter completed an MPhil degree in Engineering for Sustainable Development at the University of Cambridge, exploring uncertainty in levelised cost estimates for electricity generation technologies in the UK, and was published as an article in the journal Energy Policy.

Sebastian Brazell (Research Assistant)

Sebastian graduated with a first class honours degree BSc in Computer Science at Anglia Ruskin University in July 2015. During his studies he focused primarily on software development and human computer interaction. For his major project he investigated the application of wearable technologies in predicting health related epidemics, such as influenza. The focus on which was the current ability of wearable devices to accurately monitor and identify activity of a wearer throughout a typical day. Since graduating he has been working as a Junior Graphic Designer.