| Company | Timeline | Status | |
| Calculus Geoscience Consultants Limited Director • Unreported | 9 Jul 2012←13 Years→Current | Active | |
UCG Association Director • Professor Of Geophysics | 10 Jun 2009←1 Year 9 Months→25 Mar 2011 | Dissolved | |
| Geological Trading Limited Director • University Lecturer | 31 Oct 2005←1 Year 4 Months→15 Mar 2007 | Active | |
