Director of the Institute of Plant Nutrition and Soil Science, Kiel University, Germany (2007–present); Dean of the Faculty of Agricultural and Nutritional Sciences (2020–2022); President of the Umbrella Association of 30 Scientific Societies for Agricultural, Nutritional, and Environmental Sciences in Germany (2018–present); President of the German Society of Plant Quality Research on Plant Foods (2011–2022); President of the German Society of Plant Nutrition (2010–2014); Editor-in-Chief of the Journal of Plant Nutrition and Soil Science (2019–present); Associate Editor of Frontiers in Plant Science – Section Plant Nutrition (2011–present); Associate Editor of the Journal of Agronomy and Crop Science (2009–2019); Section Editor of the Journal of Applied Botany and Food Quality (2018–2019).