| Company | Timeline | Status | |
| Crail Airfield Ltd Director • Managing Director | 28 Sep 2022←3 Years→Current | Active | |
| GDL Jackdaw Ltd Director • Managing Director | 25 Aug 2021←4 Years→Current | Active | |
| Mayrock Ltd Director • Managing Director | 25 Aug 2021←4 Years→Current | Active | |
| Ge Solutions Consulting Limited Director • Quantity Surveyor | 21 Feb 2017←8 Years→Current | Active | |
| GDL Piling Limited Director • Quantity Surveyor | 12 Jan 2017←7 Years→19 Mar 2024 | Dissolved | |
| Ground Equipment Hire Limited Director • Construction Director | 4 Dec 2015←9 Years→Current | Active | |
| Ground Developments Limited Director • Quantity Surveyor | 3 Jun 2013←12 Years→Current | Active | |
| KJ Mackenzie Limited Director • Construction Manager | 11 Feb 2008←17 Years→27 May 2025 | Dissolved | |
