| 1970-1971 | Consultant Baumgartner & Partner, Sindelfingen
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| 1971-1980 | Pepsi Cola International Group
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| Job rotation, Offenbach
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| Operations Manager Europe, London
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| Director of Operations Germany, Offenbach
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| General Manager, Nierstein
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| 1980- 1982 | General Manager, Reemtsma, Dreieich
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| May 1982 | Foundation of Hassemer International Business Synergies
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| 1984-1996 | major shareholder in a high class textile company
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| 1984-1989 | Founder and major shareholder in an inbound/outbound telemarketing agency
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| 1991-1993 | Founder and shareholder of a EDP software company
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| 1996-1998 | Founder and major shareholder of an OTC - Company
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