Els van der Roest is a researcher in the field of energy and water in the Energy and Circular Systems team. Els has a background in chemistry and energy sciences, and is interested in the interface between energy and water, because these are two themes that increasingly rely each other in the transition to a society that runs on sustainable energy. Over the last few year Els has worked on projects concerned with the integration of electricity, heat, hydrogen and water into a single system in the Power-to-X and the Power-to-X System Design projects, for example. Moreover, together with Jos Boere and Ad van Wijk, she co-authored the book ‘Solar Power to the People’ (2017). In 2019, Els began (part-time) doctoral work in collaboration with TU Delft on integrated energy and water systems in urban environments. She takes a broad perspective and likes to act as a bridge between multiple disciples.