Visiting professorship at the Université Cheikh Anta Diop, Direction de la recherche: Bureau appui à la recherche et à l'innovation (BARI), Dakar
03/2013 - 05/2013: Visiting professorship at the Université Tours, Laboratoire CITERES, France
Since 2011: Research Fellow at GIGA, research project "Entrepreneurial Chinese Migrants and Petty African Entrepreneurs: Local Impacts of Interaction in Urban West Africa (Ghana and Senegal)"
2008 - 2010: Research Fellow at GIGA, research project "Überlebensstrategien von Migranten in Transitstädten in Mali und Mauretanien"
2005-2008: Cooperation with the CITERES in Tours (CNRS) in France: The Question of Authority in contemporary social and religious Recompositions in North and West Africa
2002 - 2006: Research Fellow, Centre for Modern Oriental Studies (ZMO), Berlin (http://www.zmo.de/Mitarbeiter/Marfaing/Marfaing.htm)
1999 - 2002: Research Fellow, University of Hamburg, Historical Seminar: Influence of Senegalese Migrants, especially from the Murids, in Germany on the Murids Brotherhood, their Investment and their Relation to State
1995 - 1997: Research Fellow, University of Hamburg, Historical Seminar: research project "Senegalese Merchants between formal and informal sector: 1930-1996" (with 15 Months Fieldwork in Senegal)
1994: Exhibition on Handcraft and artisans in Benin (Cové-Bohicon)
1991 - 1993: Research Fellow, Institute of African Affairs in Hamburg: Making an African Bibliography of Colonial Books - published until 1945 - from the Libraries and Institutes of Hamburg
1986 - 1990: Research Fellow, University of Hamburg: Commerce and Merchant in West Africa 1830 - 1930 (Senegambia and Ivory Coast)
1985 - 1990: Teacher in History – French Grammar School in Hamburg
Education: Masters in History, University of Hamburg ("Communist Party and Communist Parliamentary Party in France during the popular front, 1936-1938"); DEA (Diplôme d’Etudes Approfondies) University of Nice, France ("The Communist Party Colonial Policy in North Africa), Doctorate in History, University of Hamburg ("Change and Evolution of Commerce in Senegal - 1820-1930")