| Company | Timeline | Status | |
| O'Brien Energy Limited Director • Director | 14 Apr 2023←2 Years 8 Months→Current | Active | |
| O'Brien Holdings 2020 Limited Director • Director | 31 Mar 2023←2 Years 9 Months→Current | Active | |
| O'Brien Contractors Limited Director • Director | 9 Jun 2020←5 Years→Current | Active | |
| T.A. O'Brien Services Limited Director • Director | 3 Apr 2019←6 Years→Current | Active | |
