| Company | Timeline | Status | |
| Specialist Bioanalytical Services Limited Director • Research Chemist | 31 Dec 1991←33 Years→Current | Active | |
H D Science Limited Director • Biochemist | 29 Sep 1991←28 Years→11 Feb 2020 | Dissolved | |
H D Science Limited Secretary • Unreported | 29 Sep 1991←28 Years→11 Feb 2020 | Dissolved | |
