| Company | Timeline | Status | |
| The British Interplanetary Society Director • General Director | 6 Sep 2009←16 Years→Current | Active | |
| Gist Space Limited Secretary • Space Technology Consultant | 15 Jun 2007←15 Years→27 Dec 2022 | Dissolved | |
| Gist Space Limited Director • Technical Director | 7 Feb 2007←15 Years→27 Dec 2022 | Dissolved | |
| Gist Space Limited Secretary • Technical Consultant | 22 Apr 2004←2 Years 9 Months→6 Feb 2007 | Dissolved | |
| Commercial Space Transportation Ltd Director • Space Consultant | 11 Nov 1998←18 Years→25 May 2017 | Dissolved | |
| Orbital Memorial Ltd Director • Space Consultant | 11 Nov 1998←16 Years→10 Dec 2014 | Dissolved | |
| Commercial Space Technologies (Services) Limited Director • Company Director | 14 May 1998←26 Years→1 Oct 2024 | Dissolved | |
| Commercial Space Technologies Limited Secretary • Space Technology Technology | 1 Apr 1998←7 Years→31 Mar 2005 | Active | |
| Commercial Space Technologies Limited Director • Space Technology Technology | 20 Dec 1991←34 Years→Current | Active | |
| The British Interplanetary Society Director • Physicist | 10 Oct 1991←3 Months→31 Jan 1992 | Active | |
