NIOZ Royal Netherlands Institute for Sea Research & Utrecht University

Department of Earth Sciences, Utrecht University, The Netherlands

professor emeritus, oregon state university

Department of Geological Sciences, Stanford University

Honorary Fellow

US Geological Survey

Professor, Department of Geological Sciences, University of Florida

Professor of Earth Sciences, University of Bristol

Professor emeritus of Organic Geochemistry, Plymouth University

Professor, University of Bremen, MARUM & Dept. of Geosciences, formerly WHOI