| since 2020 | Chairwoman of the Academy Word + Number |
| 2015-2019 | Distinguished Visiting-Professor, University of Johannesburg, Centre for Education Practice Research (CEPR) |
| 2012-2014 | Visiting Professor, Centre for Education Practice Research (CEPR) at the University of Johannesburg |
| 1998-2020 | Professor of Educational Psychology, University of Duisburg-Essen |
| 07/2008-12/2008 | Visiting Professor, Deptartment of Psychology, Portland State University, Portland, Oregon USA |
| 1990-1998 | Research Assistant with the Municipal Office of School Psychologists in Cologne; focus on developing and evaluating trainings for children with special educational needs |
| 1987-1990 | Research Assistant in research projects at the Psychiatric Clinic for Children and Adolescents in Mannheim |
| 1983-1987 | Research Assistant with the research community “The Physically Disabled Child”, Cologne |
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