| 1977 – 1980 | Allgemeine Treuhand AG, Zurich, Legal Department |
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| 1980 – 1983 | Dr. Rolf Egli Law Offices, Zurich |
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| 1983 – 1988 | ATAG Ernst & Young AG, Zurich, Legal Department |
| Position: | Vice-Director, Deputy from 1987 |
| Tasks: | - | Legal advice in the areas of contract, corporate, inheritance, property, employment, debt enforcement and bankruptcy law |
| | - | Handling cases of unofficial administration in bankruptcy |
| | - | Conduct of civil lawsuits |
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| 1989 – 1992 | ATAG Ernst & Young AG, Zurich, Services Department |
| | Position: Tasks: | Director and Departmental Head Managing a services department with a staff of about 50 |
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| 1992 – 1993 | ATAG Ernst & Young AG, Zurich, Mergers & Acquisitions |
| | Position: Tasks: | Partner and Departmental Head Advice in the fields of buying and selling companies, cooperation agreements and mergers |
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| since April 1993 | Wenger Plattner, Basle, Zurich and Berne Partner since 1 January 1995 |
| Tasks: | - | Legal advice in the areas of contract, corporate, matrimonial, inheritance, property, employment, debt enforcement and bankruptcy law |
| | - | Assignments as Administrator |
| | - | Unofficial administration in bankruptcy |
| | - | Conduct of civil lawsuits |