| Company | Timeline | Status | |
| Kestrel Radar Sensors Limited Director • Unreported | 25 Oct 2013←12 Years→Current | Active | |
| Tsien (U.K.) Limited Secretary • Electrical Engineer | 3 Nov 2004←21 Years→Current | Active | |
| Tsien (U.K.) Limited Director • Unreported | 28 Sep 1995←30 Years→Current | Active | |
