| Company | Timeline | Status | |
| Trebtown Limited Director • Consultant | 31 Dec 1991←34 Years→Current | Active | |
| Aspenheath Limited Director • Electronic Engineer | 31 Dec 1990←34 Years→23 Dec 2024 | Active | |
| Trebtown Limited Director • Unreported | 1 Jan 1970←55 Years→23 Dec 2024 | Active | |
