| Company | Timeline | Status | |
| Gisg Director • Engineering Consultant | 4 Oct 2013←6 Years→30 Jan 2020 | Active | |
| Cogdem Director • Engineer | 14 Jul 2005←13 Years→28 Jun 2019 | Active | |
Electromagnolia Limited Director • Engineer | 26 May 2005←15 Years→20 Oct 2020 | Dissolved | |
| Crowcon Detection Instruments Limited Director • Director | 15 Aug 1991←13 Years→30 Apr 2005 | Active | |
