| Company | Timeline | Status | |
| The Mount Estate Management Co. Limited Director • Retired | 1 Mar 2008←17 Years→Current | Active | |
| The Mount Residents Management Co. Limited Director • Retired | 10 Oct 2007←18 Years→Current | Active | |
| The Mount Residents Management Co. Limited Secretary • Retired | 10 Oct 2007←18 Years→Current | Active | |
