| Company | Timeline | Status | |
| The British Interplanetary Society Director • Author | 7 Sep 2013←5 Years→2 Aug 2019 | Active | |
| Astro Info Service Ltd Director • Unreported | 1 Mar 2012←13 Years→Current | Active | |
| Astro Info Service Ltd Secretary • Cosmic Consultant | 19 May 2005←1 Year 1 Month→4 Jul 2006 | Active | |
| Astro Info Service Ltd Secretary • Cosmic Consultant | 20 Aug 2003←1 Month→16 Oct 2003 | Active | |
| Astro Info Service Ltd Director • Space Historian | 20 Aug 2003←6 Years→8 Jul 2010 | Active | |
