| Company | Timeline | Status | |
| Sentek Limited Secretary • Electronic Engineer  | 27 Oct 1992←2 Years 7 Months→15 Jun 1995  | Active  | |
| Sentek Limited Director • Electronic Engineer  | 27 Oct 1992←23 Years→28 Oct 2015  | 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  | |
