| Company | Timeline | Status | |
| Borehole Engineering Services Ltd Director • Unreported | 16 Jun 2015←10 Years→Current | Active | |
| Geotechnical Exploration Services Ltd Director • Managing Director | 16 Jun 2015←7 Years→16 Aug 2022 | Dissolved | |
Geothermalplus Limited Director • M.d. | 20 Dec 2008←6 Years→24 Feb 2015 | Dissolved | |
| Downhole Technologies Limited Director • Director | 11 Apr 2008←12 Years→19 Jan 2021 | Dissolved | |
| Downhole Technologies Limited Secretary • Director | 11 Apr 2008←12 Years→19 Jan 2021 | Dissolved | |
| Project Dewatering Limited Director • Chairman | 19 Jul 1999←16 Years→1 Jan 2016 | Active | |
| Drilcorp Limited Secretary • Unreported | 31 Mar 1995←30 Years→Current | Active | |
| Drilcorp Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
