| Company | Timeline | Status | |
| 5 Ridsdale Road Management Company Limited Director • Retired | 1 Jul 2013←12 Years→Current | Active | |
| Lee Process Design Limited Director • Chemical Engineer | 28 Jun 1991←34 Years→Current | Active | |
| Lee Process Design Limited Secretary • Unreported | 28 Jun 1991←34 Years→Current | Active | |
