Dr Ehret has been active in the field of hydrogen for over 20 years. His professional career includes nine years as programme manager at the former National Organisation for Hydrogen and Fuel Cell Technology (NOW GmbH) and various research and consulting activities, e.g. for Cardiff University and the DVGW. Dr Ehret is currently head of department at the Steinbeis company SIEET and cluster manager at Esslingen University of Applied Sciences. He is the author of a series of applied studies on hydrogen and fuel cells, particularly in the transport sector, and plays a leading role in the ongoing infrastructure projects H2 GeNeSiS and H2 Flex.