| Company | Timeline | Status | |
| Dolphin Flat Management (Sandgate) Limited Secretary • Unreported | 7 Apr 1995←3 Years→2 Sep 1998 | Active | |
| Dolphin Flat Management (Sandgate) Limited Director • Scientist | 11 Feb 1991←15 Years→18 Aug 2006 | Active | |
| 14 Lawn Road Limited Director • Research Scientist | 30 Jan 1991←5 Years→7 Jan 1997 | Active | |
