| Company | Timeline | Status | |
| Bitherstone Services Limited Director • Chemist | 20 Nov 2001←24 Years→Current | Active | |
| Phosphor Technology Limited Director • Chemist | 19 Jan 1992←34 Years→Current | Active | |
| Phosphor Technology Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
