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Hagen Graf's professional experience
02/1997 - to present
open source author, - trainer, - creative problem solver
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1993 - 1996
Beauftragter für den Verkauf von gebrauchten Omnibussen weltweit
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Hagen Graf's event attendances
Hagen Graf attended the following events – were you there as well?
BarCamp Köln 2018Köln