| Company | Timeline | Status | |
| Boocock Trading Limited Director • Director | 1 Apr 2003←22 Years→Current | Active | |
| Caltech Service Company Limited Director • Engineer | 1 Jun 2001←4 Years→31 Aug 2005 | Active | |
Tritec Engineering Limited Director • Engineer | 18 Aug 1998←18 Years→22 Nov 2016 | Dissolved | |
| Combustion Installations Limited Director • Engineer | 26 Apr 1991←34 Years→Current | Active | |
| Sunbury Engineering Company Limited Director • Engineer | 26 Apr 1991←34 Years→Current | Active | |
