| Company | Timeline | Status | |
| Scrabster Engineering Services Limited Director • Engineer | 7 Oct 2013←12 Years→Current | Active | |
Calder Offshore Cabins Ltd Director • Engineer | 24 Sep 2009←10 Years→8 Oct 2019 | Dissolved | |
| Calder Offshore Limited Director • Engineer | 24 Sep 2009←16 Years→Current | Active | |
| Calder Engineering Ltd Director • Engineer | 20 May 1989←36 Years→Current | Active | |
