| Company | Timeline | Status | |
| Ashbyrne Homes Ltd Director • Director | 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 • Company Director | 19 Jun 1991←34 Years→Current | Active | |
| J. Byrne Plant Hire & Civil Engineering Limited Director • Company Director | 17 Jun 1991←34 Years→Current | Active | |
