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 University 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.

José Azevedo

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.

Gabriel Carmona Aparicio

Gabriel Carmona Aparicio (Research Fellow)

Gabriel is a Marie Curie Research Fellow working on resource efficiency, material/energy services and the circular economy, as part of the CircNexSt project. In 2020, Gabriel completed his PhD in Sustainable Energy Systems at the University of Lisbon (Portugal). He focused on the stock-flow-service nexus to facilitate a more comprehensive analysis of resource production, consumption, and accumulation. Prior to joining the Resource Efficiency Collective, Gabriel worked on several H2020 projects, where he assessed the sustainability of emerging technologies. He also has over fifteen years of experience working as a consultant and sustainability professional. He advised Latin American companies in the public transport, infrastructure, and hydrocarbon sectors. Gabriel obtained an Environmental Engineering degree at La Salle University (Colombia) and a master’s degree in Energy Efficiency and Industrial Ecology at the University of Zaragoza (Spain).

Karla Cervantes Barrón (Research Associate)

Karla is a Research Associate in the Resource Efficiency Collective working on the Climate Compatible Growth (CCG) programme where she is looking at how developing countries can change their energy and transport systems towards low-carbon options. Karla completed her PhD about the level of energy services used in different countries in December 2020 as a member of Corpus Christi College. Prior to this, Karla worked in the non-alcoholic beverage sector in Mexico in two of the biggest global companies in the areas of quality, operations and environmental responsibility. Karla studied Chemical Engineering at the National Autonomous University of Mexico (UNAM) and obtained an MSc in Environmental Systems Engineering from UCL.

Natanael Bolson

Natanael Bolson (Research Associate)

Natanael is mapping energy and material flows to establish efficient resources use in the foundation industries as part of the TransFIRe project. His background is in the analysis of energy systems towards sustainable development. He holds a PhD in Energy Resources and Petroleum Engineering and a MSc in Mechanical Engineering from King Abdullah University of Science and Technology (KAUST) in Saudi Arabia. Prior to KAUST, he obtained a BSc in Renewable Energy and Environment Engineering at the Federal University of Pampa in Brazil.

Luke Cullen

Luke Cullen (PhD Student)

Do you have the feeling that everything is connected somehow? Well, so does Luke. For his PhD, as part of the AI for Environmental Risks CDT, Luke is developing a framework based on graph representation learning to map greenhouse gas emissions sources as part of a global network. Luke has a Master’s degree in Geophysics from the University of Leeds, after which he spent two years working as a contractor in the mining and energy industries in Australia. He then returned to the UK as a software developer and has recently completed an MRes using machine learning to accelerate damage assessments following natural disasters.

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.


Lukas Gast (Research Assistant)

Lukas joined the Resource Efficiency Collective to work on resources use and industrial symbiosis in the foundation industries as part of the TransFIRe project. The goal is to identify best practices and benchmarks to increase resource efficiency within the foundation industries (steel, cement, chemicals, metals and paper). He previously studied Industrial Engineering at TU Berlin and KTH Stockholm. Besides work, he enjoys travelling and organising field trips to industrial production sites.

Samantha Islam

Samantha Islam (Research Assistant)

In 2021 Samantha completed 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 Defence Force Academy for a year.

Scott Jeen

Scott Jeen (PhD Student)

Scott is interested in machine intelligence and its capacity to help humans reduce their societal emissions. In practice, this means writing machine learning algorithms – primarily Deep Reinforcement Learning techniques (DRL) and Gaussian Processes (GPs) – to optimise the control of equipment in buildings and industrial processes. He’s particularly interested in a DRL agent’s ability to take actions that, at first, seem counter-intuitive to humans, but later provide us a richer understanding than we could have achieved alone (cf. AlphaGo’s move 37). He believes these agents can teach us much that we do not yet understand about the complex systems fundamental to climate change mitigation. In the past, Scott has completed engineering degrees at the University of Cambridge and the University of Edinburgh, conducted research with the Use Less Group at Cambridge, and worked as a corporate consultant. His research is generously funded by the EPSRC, Emerson Electric and Sir Sean Connery’s Scottish International Education Trust.

Ella Jennings

Ella Jennings (Research Assistant)

Ella is a Research Assistant working as part of C-THRU project. She is working to operationalise the petrochemical industry’s markets Archetype Model that is being developed for C-THRU. She first studied for a BSc in Astrophysics and Geophysics at University College London before moving into engineering, completing the Energy Technologies MPhil at Cambridge University in 2021. For her masters’ thesis she researched energy conversion pathways and their efficiencies through the global energy system, abstracting away from technical devices to the fundamental conversions between energy forms. This research will hopefully be taken further next year in a PhD with Jonathan Cullen and the Resource Efficiency Collective.  

Omar Abo Madyan

Omar Abo Madyan (Research Associate)

Omar is a Research Associate in material-efficient construction. His background is in civil engineering and sustainability with a PhD in material science focusing on biodegradable aerogels made from sustainable and renewable materials for the construction industry. His background in material formulation and whole life carbon analysis led him to work on several European projects focusing on innovative low carbon construction composites/materials, i.e. ICECLAY, and GELCLAD. He is currently working on assessing the material efficiency for the Automating Concrete Construction project (ACORN), while simultaneously working with Expedition Engineering to assess the material efficiency of industry partners’ own processes and help guide the industry towards improved material efficiency.

Fanran Meng

Fanran Meng (Research Associate)

Fanran is a Research Associate working on the critical review and data modelling and uncertainty across petrochemical sectors as part of the C-THRU project. Previously, he was a research fellow in Sustainable Material and Technologies at the University of Nottingham. He received his PhD degree in Materials Engineering and Materials Design from the University of Nottingham in 2017. His research focuses on resource efficiency and life cycle sustainability which integrates engineering and science-based disciplines with insights from economic sciences to develop system optimisation and policy relevant strategies.

Ana Morgado

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.

Joanna Wakeling

Joanna Wakeling (Centre Coordinator)

Joanna joined Resource Efficiency Collective in September 2020 as Centre Coordinator. Previously, she taught English as a Second Language in Hong Kong and Cambridge, and then became Academic Manager at an English language school. She is particularly interested in bringing the work of the group to a wider audience and making the conversation around resource efficiency accessible and inclusive.

Cuicui Xiao

Cuicui Xiao (Academic Visitor)

Cuicui Xiao is an Assistant Professor at School of Humanities and Social Sciences, University of Science & Technology Beijing, China. She is currently visiting the Department of Engineering, University of Cambridge for eight months. She completed her PhD at Renmin University of China and is a Postdoctoral Researcher at Tsinghua University. Cuicui’s research interests mainly focus on Environmental Economics, Environmental Policy and Environmental Management.

Past People

Arthur Poole

Arthur Poole (Project Assistant)

Arthur is a gap year student working as a Project Assistant largely on the C-THRU project. He will be assisting the team in their critical review and getting involved in other Refficiency projects. He is excited to contribute to the work of the group and gain knowledge and first-hand experience in this field. With A-Levels in Maths, Chemistry and Biology, Arthur will be studying Chemical Engineering at the University of Nottingham.

Claudio Lubis

Claudio Lubis (Research Assistant)

Claudio recently graduated in 2021 with an MPhil in Energy Technologies from the University of Cambridge. His dissertation focused on projecting various electricity demand scenarios and evaluating the material implications (demands, emissions and economics) of energy technologies for Indonesia in the foreseeable future. Prior to Cambridge, he holds a Bachelor’s of Science in Petroleum Engineering from the Colorado School of Mines, with a focus on drilling and reservoir engineering. He is very excited to be part of the Resource Efficiency Collective, where he will be working on the TransFIRe project, aimed at identifying the best practices and benchmarks to increase resource efficiency within the foundation industries (chemicals, cement, ceramics, glass, metals and paper). 

Tatiana Vandermark

Tatiana Vandermark (Project Assistant)

Tatiana is a first year Chemistry student at the University of Oxford with an interest in energy efficiency. She was a member of her school’s green team, focussing on improving access to sustainable transport options for younger students and promoting renewable energy awareness. Tatiana will be predominantly assisting on the C-THRU project and its first year report. She is looking forward to learning about the work of the group and seeing how she can contribute to the project’s goals.

aurelia (graded)

Aurelia Hibbert (Research Assistant)

Aurelia is a Research Assistant covering the area of Low Carbon Concrete Technologies (LCCT), specifically the understanding and uptake of these technologies in the UK Architecture, Engineering and Construction (AEC) sector. Aurelia studied her undergraduate and Master of Engineering degrees at Cambridge, working with Resource Efficiency Collective for her final thesis on the uncertainty of embodied energy calculations for structures. She also has experience as a consultant in the Australian energy sector, working with clients to decarbonise their energy supply and support the energy transition. (Photo credit: Si Barber)

Rob (graded)

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.

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. Find him on Twitter.


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.


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.

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.

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.