1991 | Professor of Sociology and Economics, School of Social Sciences, University of Mannheim, Germany |
1987-1991 | Professor of Sociology, School of Economics and Social Sciences, University of Cologne, Germany |
1985-1987 | Managing director of the Center of Surveys, Methods and Analyses (ZUMA) e.V., Mannheim, Germany |
1981-1987 | Professor of Empirical Social Research, Department 1, University of Essen GH, Germany |
1980-1981 | Chair representative (C4) of Empirical Social Research, University of Essen GH, Germany |
1978-1982 | Professor (C3) of Methods of Empirical Social Research, University of Duisburg, Germany |
1974-1975 | Chair representative (C3), RWTH Aachen, Germany |
1974-1978 | Academic Committee, Department of Social Sciences, Ruhr-University Bochum, Germany |
1974-1978 | Academic Staff Member, Department of Social Sciences, Ruhr-University Bochum, Germany |
04/ | Academic Staff Member, Chair of Sociology and Research Philosophy, Department of Social Sciences, University of Mannheim, Germany |
1970-1974 | Lecturer at the RWTH Aachen and Protestant University of Applied Religious and Social Pedagogy Düsseldorf, Germany |
1970-1974 | Research Assistant, Seminar of Sociology, University of Cologne, Germany |
June/ | Habilitation (Sociology and Methodology of Social Sciences), University of Bochum, Germany |
1978 | Scholarship for Habilitation by the German Science Foundation, drop out due to call to professorship (C3), University of Duisburg GH, Germany |
1974 | Promotion, School of Economics and Social Sciences, University of Cologne, Germany |
1970 | Diplom-Examen, School of Economics and Social Sciences, University of Cologne, Germany |
1963 | Abitur, Staatliches Altsprachliches Gymnasium Jülich, Germany |