| Company | Timeline | Status | |
| Ashbyrne Homes Ltd Director • Unreported | 19 Feb 2016←9 Years→Current | Active | |
| Sheerness Golf Club Limited Director • Construction Engineer | 20 Mar 1998←22 Years→30 Apr 2020 | Active | |
| Byrne Contractors Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
| J. Byrne Plant Hire & Civil Engineering Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
