2006: lectureship at the Carl-von-Ossietzky-University Oldenburg, department law and economics
2005-2006: substitution of a chair faculty of law at the Johann Wolfgang Goethe-University of Frankfurt on the Main
2005-2007: private lecturer at the Christian-Albrechts-University of Kiel; free publicist, consultant and lecturer
2005: postdoctoral lecture qualification for public law including European Union Law, Social Security Law and Health Care Law with the scripture „Disability and rehabilitation in the social constitutional state“ and the lecture „The Treaty establishing a Constitution for Europe and the municipal public services“
1999-2005: scientific assistant to Prof. Dr. Gerhard Igl at the institute for social law and social policy in europe of the Christian-Albrechts-University of Kiel
1996-1998: legal trainee at the higher regional court of Hamburg up to the second legal state examination