| Company | Timeline | Status | |
| Crichton Foundation Director • Environmental Consultant | 25 Mar 2010←5 Years→25 Nov 2015 | Active | |
| Crichton Carbon Centre Director • Management Consultant | 12 Jul 2007←18 Years→Current | Active | |
| RSK Investments Limited Director • Director | 19 Nov 2002←22 Years→Current | Active | |
| RSK Group Limited Director • Director | 26 Jan 2001←24 Years→Current | Active | |
| The Southern Uplands Partnership Director • Environmental Consultant | 13 Sep 2000←4 Years→8 Jun 2005 | Active | |
| Kenera Limited Director • Environmental Consultant | 8 Mar 1996←27 Years→18 Jul 2023 | Dissolved | |
| Kenera Limited Secretary • Unreported | 8 Mar 1996←27 Years→18 Jul 2023 | Dissolved | |
| RSK Environment Limited Director • Environmental Consultant | 25 Mar 1994←31 Years→Current | Active | |
