| since 2009 | Business consultant
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| 2002 - 2009 | Hoffmeister Leuchten GmbH Technical lighting
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| 1998 - 2002 | uwe GmbH Solariums, submersible motors, equipment for swimming pools
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| 1989 - 1998 | AEG Lichttechnik Technical lighting
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| prior to 1989 | Universität Hannover Studies
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