Prof.dr.ir. Paulien Herder is a full professor in Energy Systems Engineering. In the context of her chair she studies the design and management of energy systems and more specifically she is interested in energy systems integration and the transition to a sustainable energy provision. In this research, engineering sciences as well as social and behavioural sciences play an important role. She currently co-leads the e-Refinery initiative at TU Delft, which is a university-wide research programme into electrochemical conversion and storage of energy, between the faculties of Applied Science, Mechanical Engineering, Electrical Engineering, and Technology, Policy & Management. Paulien is director of the Delft Energy Initiative, which is a portal to about 1000 energy researchers on the Delft campus, and member of the Top Team Energy, as Captain of Science, where she is responsible for bringing in the knowledge institutes into the innovation process towards the energy transition.