- Consultant psychologist Friedrich Krupp GmbH, Essen, Germany, 1973. Researcher University Bochum, Germany, 1973-1983. Professor University Heidelberg, Germany, 1983-1995, University Potsdam, Germany, since 1995.
- Author: Achievementevaluation and Motivation to Learn, 1980, Purpose and Action, 1989, Enhancing Motivation in Schools, second edition, 1999, Motivation, 4th edition, 2002, Diagnostic of Motivation and self concept, 2003. Editor German Journal Educational Psychology, 1987-1993. Contributor articles to professional journals.