| Company | Timeline | Status | |
| Drilling Fluid Management Systems Limited Director • Consultant Engineer  | 27 Mar 2015←10 Years→Current  | Active  | |
Douglas-Wilson Consultants Limited Secretary • Geologist  | 23 Jul 2009←8 Years→3 Jul 2018  | Dissolved  | |
Douglas-Wilson Consultants Limited Director • Drilling Fluids Consultant  | 19 Oct 1992←25 Years→3 Jul 2018  | Dissolved  | |
