| Company | Timeline | Status | |
| Donald Robb Engineering Ltd Director • Engineer | 4 Jan 2019←2 Years 11 Months→30 Nov 2021 | Dissolved | |
| Euan Macdonald Properties Limited Director • Engineering Consultant | 27 Aug 2015←10 Years→Current | Active | |
Binker Limited Director • Director | 4 Oct 2004←14 Years→11 Dec 2018 | Dissolved | |
