Ewald is chair of the Energy Web Foundation. He is also co-founder and CEO of Grid Singularity, rooted in his extensive experience in the energy sector and acute interest in distributed business models, and serves as an advisor to blockchain investment firm Scytale Ventures and several start-ups. Ewald previously worked as regional director for business development and strategy in Southeast Europe at Andritz Hydro. Earlier in his career he worked in business development for ABB and prior to that explored technology transfer and joint ventures in China and European automobile sectors at Metzler. He holds a Diploma in Mechanical Engineering and Project Management from the University of Konstanz, Germany.