Hans Gruber is Full Professor of Educational Science at the University of Regensburg (Germany) and Visiting Professor at the Faculty of Education, University of Turku (Finland). Currently he serves as Editor-in-Chief of Educational Research Review, and as Member of the Board of Trustees at the University of Education Weingarten (Germany). Previously, he served as Vice-Rector of the University of Regensburg. He is Past President of the European Association for Research in Learning and Instruction (EARLI). His main research topics are Professional Learning, Expertise, Workplace Learning, Social Network Analysis, and Higher Education.