| Company | Timeline | Status | |
| R 4 Electrical Limited Director • Engineer | 7 Nov 2001←24 Years→Current | Active | |
| Amptronik Control Systems Limited Director • Engineer | 31 Dec 1991←34 Years→Current | Active | |
| Amptronik Control Systems Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
