Stephanie Aufmkolk is a Senior Manager in Sales Business Development at Umicore since August 2011. Prior to that, Stephanie worked as a Sales Manager at J. T. Ronnefeldt KG from September 2006 to July 2011. Stephanie holds a Master of Business Administration (MBA) in International Management from Euro-FH Europäische Fernhochschule Hamburg and a Diplom in Betriebswirtschaft from Hochschule Aschaffenburg.
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