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Since 2011: State Secretary at the Ministry for Economic Affairs and Innovation of the Free and Hanseatic City of Hamburg (FHH), until June 2020 Department of Transportation, since June 2020 Department of Economic Affairs
2007 - 2011: Mayor, Hanseatic City of Stade
2000 - 2007: Member of the City Council (Economy and Finance) (2000 - 2006) and Chairman of the City Council (2006 - 2007), City of Aurich
1996 - 2000: Consultant, later Head of Department in the joint regional planning Hamburg, Lower Saxony and Schleswig-Holstein and coordinator for the regional development concept in the Hamburg Metropolitan Region
1991 - 1995: Ministry for Urban Development, member of the founding staff and personal advisor of the Senator for Urban Development (1991 - 1993), Head of the Department for Presidential and Parliamentary Affairs (1993 - 1995), FHH
1988 - 1991: Scientific assistant for several members of the Hamburg City Parliament (1988 - 1989) and for the Social Democratic Party Hamburg (1989 - 1991)