| Company | Timeline | Status | |
| M J Gallagher Holdings Limited Director • Civil Engineer | 11 Nov 2025←1 Month→Current | Active | |
| Construct, Concrete Structures Group Limited Director • Civil Engineer | 15 Apr 2015←5 Years→10 Sep 2020 | Active | |
| R.C. Plant Hire Limited Director • Director | 11 Jun 2003←22 Years→Current | Active | |
| Michael J Gallagher Contractors Limited Director • Civil Engineer | 20 Jul 2001←24 Years→Current | Active | |
