| Company | Timeline | Status | |
| E-Diesels Limited Director • Engineer | 30 Sep 1999←26 Years→Current | Active | |
| Corven Properties Limited Director • Engineer | 28 Apr 1995←30 Years→Current | Active | |
| Duncan Rogers (Engineering) Limited Director • Engineer | 31 Mar 1991←34 Years→Current | Active | |
| Ardnaw Farms Limited Director • Engineer | 30 Oct 1990←35 Years→Current | Active | |
