| Company | Timeline | Status | |
| D. G. Heuchan Contracts Ltd Director • Unreported | 3 Dec 2020←4 Years→Current | Active | |
| Road Rail Rentals Limited Director • Unreported | 15 Aug 2004←21 Years→Current | Active | |
Davie Malcolm Transport Limited Director • Civil Engineer | 21 Jan 2004←8 Years→22 Jan 2012 | Dissolved | |
| D.G. Heuchan Construction Ltd Director • Contractor | 19 Aug 1998←27 Years→Current | Active | |
