| Company | Timeline | Status | |
| Sentek Limited Director • Electronic Engineer | 7 Oct 1992←23 Years→28 Oct 2015 | Active | |
Jenway Limited Director • Electronics Engineer | 16 Jul 1991←3 Years→30 Sep 1994 | Dissolved | |
Jenway Limited Secretary • Unreported | 16 Jul 1991←3 Years→30 Sep 1994 | Dissolved | |
| Kalestead Limited Director • Electronics Engineer | 16 Jan 1991←7 Years→5 Jun 1998 | Active | |
