Gabriel is a researcher in energy, climate change, and air pollution at Imperial College London, where he investigates decarbonisation scenarios for Europe, China and India. His expertise covers CO2 capture and utilisation technologies, biomass to power and heat plants, life cycle assessment, and greenhouse gas emission reporting methods.

He has worked at various academic institutions, consultancy firms, and policy organisations, and contributed to different expert groups including a European Environmental Agency task force on black carbon emission estimation, and the World Economic Forum’s expert network. He is also a reviewer for prestigious journals in his fields of interest.