| Company | Timeline | Status | |
| Petroleum Geology Conferences Limited Director • Geologist | 10 Jan 2008←5 Years→11 Mar 2013 | Dissolved | |
| Earthgroup Limited Director • Engineer | 27 Nov 2002←22 Years→Current | Active | |
| John H. Martin Associates Ltd Director • Unreported | 1 Sep 1994←31 Years→Current | Active | |
