| Company | Timeline | Status | |
| John Plant Engineering/Admin Services Limited Director • Access Control Officer | 11 Mar 2016←4 Years→17 Nov 2020 | Dissolved | |
John Plant Technical Services Limited Director • Technical | 2 Apr 2007←9 Years→22 Nov 2016 | Dissolved | |
| 18/22 Longstone Road Management Company Limited Director • Technician | 6 May 2005←20 Years→Current | Active | |
