| Company | Timeline | Status | |
| Hillside Park Freehold Limited Director • Civil Engineer | 19 Aug 2005←20 Years→Current | Active | |
| Hillside Park Freehold Limited Secretary • Civil Engineer | 19 Aug 2005←7 Years→1 Feb 2013 | Active | |
| Hillside Park Residents Company Limited Director • Retired | 10 Nov 2004←20 Years→Current | Active | |
| Courtcrest Limited Secretary • Civil Engineer | 8 Jul 2004←9 Years→30 Sep 2013 | Active | |
| Courtcrest Limited Director • Civil Engineer | 28 Nov 2000←12 Years→25 Jul 2013 | Active | |
