| Company | Timeline | Status | |
| Parker Environmental Services Holdings Limited Director • Director | 14 Jul 2025←6 Months→Current | Active | |
| Nuclear Ventilation Systems Limited Director • Director | 24 Oct 2012←13 Years→Current | Active | |
| Nuclear Ductwork Systems Limited Director • Director | 24 Oct 2012←13 Years→Current | Active | |
| Nuclear Manufacturing Services Limited Director • Director | 7 Dec 2011←14 Years→Current | Active | |
| Nuclear Ventilation Projects Limited Director • Director | 7 Dec 2011←14 Years→Current | Active | |
| Parker Nuclear Services UK Limited Director • Director | 7 Dec 2011←14 Years→Current | Active | |
| Nuclear Manufacturing Projects Limited Director • Director | 7 Dec 2011←14 Years→Current | Active | |
| Parker Environmental Services Limited Director • Company Secretary | 13 Apr 1999←26 Years→Current | Active | |
