| Company | Timeline | Status | |
| OBS Management Services Limited Director • Director | 2 Feb 2021←4 Years→Current | Active | |
| O'Brien Building Services Limited Director • Unreported | 3 Dec 2014←11 Years→Current | Active | |
| O'Brien Interiors Limited Director • Director | 23 Nov 2009←16 Years→Current | Active | |
Amishi Limited Director • Director | 27 Jul 2006←8 Years→21 Oct 2014 | Dissolved | |
