| Company | Timeline | Status | |
| Airtight Testing Scotland Limited Director • Engineer | 26 Jul 2010←15 Years→Current | Active | |
| Airtight Testing Scotland Limited Director • Engineer | 26 Jul 2010←13 Years→31 May 2024 | Active | |
| George Christie Properties Limited Secretary • Manager | 28 Dec 2001←22 Years→2 Apr 2024 | Dissolved | |
| George Christie Properties Limited Director • Manager | 28 Dec 2001←22 Years→2 Apr 2024 | Dissolved | |
| Commissioning Operation And Training Services Limited Director • Commissioning Engineer | 29 Nov 1991←32 Years→2 Apr 2024 | Dissolved | |
