| Company | Timeline | Status | |
| Spectrum Datagraphic Systems International Limited Director • Property Consultant | 24 Nov 1991←14 Years→29 Dec 2005 | Dissolved | |
| Spectrum Geo Limited Director • Property Consultant | 10 Nov 1991←14 Years→29 Dec 2005 | Active | |
| Spectrum Geo Limited Director • Unreported | 1 Jan 1970←36 Years→29 Dec 2005 | Active | |
