| Company | Timeline | Status | |
| Charterhouse Books Limited Secretary • Technical Manager | 24 Sep 1998←27 Years→Current | Active | |
| Charterhouse Books Limited Secretary • Technical Manager | 24 Sep 1998←25 Years→26 Jun 2024 | Active | |
| Security Vision International Limited Secretary • Engineer | 28 Apr 1997←24 Years→22 Jun 2021 | Dissolved | |
