| Company | Timeline | Status | |
| Sima Vision Co Ltd Secretary • Civil Engineer | 30 Mar 2005←7 Years→10 Jul 2012 | Active | |
| Sima Vision Co Ltd Director • Civil Engineer | 30 Mar 2005←7 Years→10 Jul 2012 | Active | |
| Beresford Dunne Consultants Limited Director • Civil Engineer | 30 Jun 2004←21 Years→Current | Active | |
| 3 Cotham Park Management Limited Secretary • Civil Engineer | 15 May 1993←32 Years→Current | Active | |
| 3 Cotham Park Management Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
