| Company | Timeline | Status | |
| The Wycombe Environment Centre Limited Director • Geophysicist | 5 Dec 2003←6 Years→30 Jan 2010 | Active | |
| The Wycombe Environment Centre Limited Secretary • Geophysicist | 5 Dec 2003←6 Years→30 Jan 2010 | Active | |
| Ceradon Ltd Director • Unreported | 11 May 2001←24 Years→Current | Active | |
| The Information Store, Ltd Director • Geophysicist | 16 May 1995←5 Years→30 Apr 2001 | Active | |
| The Information Store, Ltd Secretary • Sad | 16 May 1995←2 Years 7 Months→15 Dec 1997 | Active | |
