| Company | Timeline | Status | |
| Northern I.T. Research Ltd Director • Engineer | 1 Sep 2002←8 Years→24 May 2011 | Dissolved | |
| Photon Fire Limited Director • Physicist Engineer | 5 Aug 2002←19 Years→10 May 2022 | Dissolved | |
| Photon Fire Limited Secretary • Unreported | 5 Aug 2002←19 Years→10 May 2022 | Dissolved | |
Aerosol Reference Materials Limited Director • Physicist | 17 Aug 1994←4 Years→26 Apr 1999 | Dissolved | |
