ENSYSTRA trains 15 PhD researchers in all aspects of energy systems transition. The process of moving from an energy system based on fossil fuels towards an energy system with limited CO2 emissions, energy efficiency, and energy security has far-reaching implications for technologies, infrastructure, market organisation, consumer behaviour and governance. Such energy transition requires that technical sciences, social sciences and the humanities work together. We aim to train energy professionals with an integrated understanding to become experts in the front line of the energy transition. ENSYSTRA received funding from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No: 765515.