| since 2013 | Full Professor at the Sociology of Diversity Chair, Faculty of Sports and Health Sciences, Technical University of Munich |
| 2011 | Visiting Professor at the National Pingtung University of Education (NPUE), Pingtung, Taiwan and the Taipei Municipal University of Education (TMUE), Taipei, Taiwan |
| 2010-2020 | Max Planck Fellow at the Max Planck Institute for Social Law and Social Policy, Munich; since 3.2020 Guest status |
| 2008-2009 | Visiting Professor at the “Special Needs and Inclusive Education” Research Unit, Education and Development Section, Department of Education, Faculty of Philosophy and Education, Universität Wien, Austria |
| 1996-2012 | Full Professor at the Sociology of Rehabilitation Chair, Faculty of Rehabilitation Sciences, Technische Universität Dortmund |
| 1982-1996 | Development and Management of the Scientific Research Unit "Lifeworlds [Lebenswelten] of Persons with Disability" and the "Centre for Interdisciplinary Research on the Lifeworlds [Lebenswelten] of Persons with Disability" (Z.I.E.L.), Central Scientific Institute of the Eberhard-Karls Universität Tübingen |