| Company | Timeline | Status | |
| SGML Technologies Limited Director • Vorstandsvorsitzender | 4 Oct 1999←11 Months→11 Sep 2000 | Liquidation | |
| Software Ag (UK) Limited Director • President | 1 Nov 1996←6 Years→30 Nov 2002 | Active | |
| Linotype-Hell Limited Director • Director | 9 Jun 1994←2 Years 4 Months→31 Oct 1996 | Dissolved | |
