| Company | Timeline | Status | |
| Heath End Land Limited Director • Director | 28 Sep 2012←3 Years→25 Jul 2016 | Active | |
| TTL Chiltern Property Holdings Limited Director • Director | 3 Nov 2004←8 Years→31 Jan 2013 | Active | |
| Fire Test Study Group Limited Director • Technical Director | 17 Jan 1995←2 Years 10 Months→26 Nov 1997 | Active | |
| TTL Chiltern Property Limited Director • Director | 22 Feb 1994←10 Years→3 Nov 2004 | Active | |
| Trada Technology Limited Director • Research Management | 22 Nov 1991←8 Years→22 Feb 2000 | Active | |
