| Company | Timeline | Status | |
| John McDowell (Newtownards Road) Limited Director • Director | 17 Jun 2021←4 Years→Current | Active | |
| 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 | |
| Dunluce Pharmacy Limited Director • Pharmaceutical Chemist | 22 Apr 1980←45 Years→Current | Active | |
