| Company | Timeline | Status | |
| McQuillan Companies Limited Director • Company Director | 28 Feb 2024←1 Year 8 Months→Current | Active | |
| Property Investments K&R Limited Director • Company Director | 18 Dec 2023←1 Year 10 Months→Current | Active | |
| McQuillan Quarries Ltd Director • Company Director | 10 Oct 2022←3 Years→Current | Active | |
| McQuillan Developments Limited Director • Company Director | 10 Oct 2022←3 Years→Current | Active | |
| Patterson Outdoor Cleaning Solutions Limited Director • Director | 1 Nov 2018←6 Years→Current | Active | |
| McQuillan Envirocare Limited Director • Director | 1 Nov 2018←6 Years→Current | Active | |
| Edentrillick Quarries Limited Director • Director | 1 Nov 2018←6 Years→Current | Active | |
| McQuillan (Skip Hire) Limited Director • Director | 1 Nov 2018←6 Years→Current | Active | |
| John McQuillan (Contracts) Limited Director • Director | 1 Nov 2018←6 Years→Current | Active | |
