| Company | Timeline | Status | |
| 4D Engineering Limited Director • Engineer | 11 Nov 1997←25 Years→30 May 2023 | Dissolved | |
| 4D Engineering Limited Secretary • Engineer | 11 Nov 1997←25 Years→30 May 2023 | Dissolved | |
| Rotech (Swindon) Limited Director • Engineer | 31 Oct 1991←34 Years→Current | Active | |
| Rotech (Swindon) Limited Secretary • Engineer | 31 Oct 1991←34 Years→Current | Active | |
