Since 2012 Matthias Ziegler has been Professor of Psychological Assessment at the Humboldt University in Berlin. After studying psychology at the Philipps University in Marburg he obtained his doctorate in the field of psychological methodology and evaluation at Ludwig Maximilians University in Munich. After a post-doc phase he was appointed as Junior Professor of Psychological Assessment at the Humboldt University in Berlin. He was awarded a full professorship in 2012. In his research he aims at contributing to issues such personality, situation perception, and intelligence. He focuses partly on the structures and measurement of these constructs and partly on the interaction between them in the development of learning and performance over an individual’s lifetime. Prof. Ziegler was editor in chief of the European Journal of Psychological Assessment, is founding editor of Psychological Test Adaptation and Development, and currently serves as president of the European Association of Psychological Assessment. He has contributed to more than 100 scientific publications and also tries to support the science practice transfer, for example by serving on an ISO technical committee.