| Company | Timeline | Status | |
| O'Brien Waste Recycling Solutions Ltd Director • Demolition Controller | 3 Mar 2015←4 Months→28 Jul 2015 | Active | |
| Timec 1484 Limited Director • Demolition Controller | 3 Mar 2015←6 Years→2 Mar 2021 | Active | |
Max Waste Recycling Limited Director • Director | 4 Jan 2013←2 Years 7 Months→18 Aug 2015 | Dissolved | |
| Nationwide Demolition & Dismantling Limited Director • Demolition Controller | 19 May 2006←14 Years→2 Mar 2021 | Active | |
| Crossco (707) Limited Director • Director | 16 Dec 2002←20 Years→16 May 2023 | Dissolved | |
| Crossco (708) Limited Director • Director | 16 Dec 2002←18 Years→2 Mar 2021 | Active | |
| Crossco (709) Limited Director • Director | 16 Dec 2002←18 Years→2 Mar 2021 | Dissolved | |
| Verano Apartments Management Company Limited Director • Director | 5 Dec 2002←3 Years→6 Dec 2005 | Active | |
| Sycamore Property Developments Limited Director • Demolition Controller | 22 Aug 2001←19 Years→2 Mar 2021 | Active | |
| G. O'Brien & Sons (Nationwide Demolition Contractors) Limited Director • Demolition Controller | 7 Apr 1995←25 Years→2 Mar 2021 | Active | |
