| Company | Timeline | Status | |
| William Duncan Electrician Limited Director • Unreported | 1 Sep 2025←2 Months→Current | Active | |
| William Duncan Electrician Limited Director • Project Manager | 1 Nov 2021←5 Months→31 Mar 2022 | Active | |
| Elite Electrical Services Scotland Ltd Director • Unreported | 6 Oct 2020←5 Years→Current | Active | |
