| Company | Timeline | Status | |
| Calder Insulations Limited Director • Engineer | 1 May 1998←27 Years→Current | Active | |
| Calder Insulations Limited Director • Engineer | 1 May 1998←26 Years→10 Jan 2025 | Active | |
Amber Building Contracts Limited Director • Engineer | 25 Nov 1997←21 Years→22 Oct 2019 | Dissolved | |
