| Company | Timeline | Status | |
| The Eastbridge Court RTM Company Limited Secretary • Property Manager | 1 May 2007←6 Years→1 Jul 2013 | Active | |
| Sutherland House Residents Management Company Limited Secretary • Property Manager | 29 Jul 2005←5 Years→30 Jun 2011 | Active | |
| Sutherland House Residents Management Company Limited Director • Property Manager | 29 Jul 2005←5 Years→30 Jun 2011 | Active | |
| P.H.Newman Associates Limited Director • Director | 26 Sep 2003←20 Years→5 Mar 2024 | Dissolved | |
