Dr Stuart Hillmansen is a Senior Lecturer in Electrical Energy Systems within the Department of Electronic, Electrical and Systems Engineering at the University of Birmingham. He completed a PhD in Imperial College London. His main area of research interest is in traction systems for use in railway vehicles, and modeling and measurement of energy consumption for railway systems (both AC and DC). His team have developed the 1st Hydrogen Fueled locomotive in the UK. The group are currently partnering with Porterbrook to develop a mainline tri-mode hydrogen train. He is a member of the Birmingham Centre for Railway Research and Education. He leads the Railway Traction Research Group whose portfolio of activities is supported by the railway industry and government. He has authored a number of papers on railway energy consumption and presented the work at a number of international conferences. He is on the editorial board of the Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit.