| Company | Timeline | Status | |
| Declan Charles Byrne Developments Ltd Director • Engineer | 4 Jan 2023←2 Years 9 Months→Current | Active | |
| Air Conditioning Scotland Limited Director • Engineer | 23 Oct 2015←10 Years→Current | Active | |
| Merchant City Estates Limited Director • Engineer | 23 Oct 2015←10 Years→Current | Active | |
| Air Conditioning Sales UK Limited Director • Mechanical Engineer | 13 Nov 2001←23 Years→Current | Active | |
