| Company | Timeline | Status | |
| John McDowell (Donegall Road) Limited Director • Director | 17 Jun 2021←4 Years→Current | Active | |
| John McDowell (Lisburn) Limited Director • Director | 17 Jun 2021←4 Years→Current | Active | |
| John McDowell (Newtownards Road) Limited Director • Director | 17 Jun 2021←4 Years→Current | Active | |
| John McDowell (Lisburn) Limited Director • Director | 17 Jun 2021←2 Years 11 Months→31 May 2024 | Active | |
