| Company | Timeline | Status | |
| Spellman High Voltage Electronics Limited Director • Manager | 12 Jul 1999←2 Years 9 Months→12 Apr 2002 | Active | |
| Hitek Power Limited Director • Accountant | 19 Jun 1992←7 Months→31 Jan 1993 | Active | |
| Schurter Limited Director • Accountant | 19 Jun 1992←4 Years→12 Jul 1996 | Active | |
