| Company | Timeline | Status | |
| Sentek Limited Director • Electronic Engineer | 27 Oct 1992←23 Years→28 Oct 2015 | Active | |
| Sentek Limited Secretary • Electronic Engineer | 27 Oct 1992←2 Years 7 Months→15 Jun 1995 | Active | |
Jenway Limited Director • Chairman | 16 Jul 1991←3 Years→30 Sep 1994 | Dissolved | |
| Kalestead Limited Director • Sales Director | 16 Jan 1991←7 Years→5 Jun 1998 | Active | |
