| Company | Timeline | Status | |
| McDowall Air Conditioning (U.K.) Limited Secretary • Air Conditioning Engineer | 12 Apr 2004←13 Years→1 Apr 2018 | Dissolved | |
| McDowall Limited Secretary • Director | 12 Apr 2004←13 Years→1 Apr 2018 | Dissolved | |
| McDowall Air Conditioning (U.K.) Limited Director • Air Conditioning Engineer | 30 Jul 1991←26 Years→1 Apr 2018 | Dissolved | |
| McDowall Limited Director • Director | 31 Dec 1990←27 Years→1 Apr 2018 | Dissolved | |
