Ralph Ripken is a Senior Consultant at E4tech, a strategic sustainable energy consultancy based in London and Lausanne. He has seven years of experience in the sustainability and renewable energy sector, with particular experience evaluating sustainable energy projects in a development context. Ripken analysed a wide range of bioenergy projects in Sub-Saharan Africa to understand the opportunities and barriers for the uptake of modern bioenergy technologies. He has led various techno-economic, feasibility and policy analyses and conducted landscape studies to provide strategic support to and inform investment and policy decisions of private and public organizations operating along various sustainable energy value chains. He holds an MSc in Environmental Sciences, Policy and Management from Lund University, Central European University and Manchester University.