| Company | Timeline | Status | |
| Isaac Hamilton & Sons Limited Director • Manager | 9 May 2000←24 Years→25 Sep 2024 | Dissolved | |
| Mourne Granite Quarries Limited Director • Director | 9 Dec 1999←20 Years→21 Oct 2020 | Active | |
| Mournesports Limited Director • Director | 28 May 1996←28 Years→10 May 2025 | Active | |
| Natural Stone Specialists Limited Director • Manager | 29 Nov 1983←40 Years→17 Sep 2024 | Dissolved | |
