| Company | Timeline | Status | |
| Firgrove Contract Services Limited Director • Engineer | 30 Apr 2007←15 Years→9 Aug 2022 | Dissolved | |
| Firgrove Civil Engineering Limited Director • Engineer | 28 Dec 1990←35 Years→Current | Active | |
| Firgrove Civil Engineering Limited Director • Unreported | 1 Jan 1970←56 Years→Current | Active | |
