Chair of Environmental and Resource Economics and Sustainability, Ruhr University Bochum

Research Associate at RWI – Leibniz Institute for Economic Research

Chair of Microeconomics, especially Energy and Resource Economics, and Director of the Center for Applied Economic Research, University of Münster

Chairman of the Board of Directors of the "Energy Systems of the Future" (ESYS) initiative of the German National Academy of Sciences Leopoldina, the National Academy of Science and Engineering acatech and the Union of the German Academies

Chair of the German Federal Government’s Expert Commission for Monitoring the Energy Process Transition