| Company | Timeline | Status | |
| Instrotech Limited Director • Unreported | 16 Dec 2021←3 Years→Current | Active | |
| Martindale Electric Company Limited Director • Unreported | 29 Nov 1997←27 Years→Current | Active | |
| Weirmead Limited Director • Engineer | 1 Jun 1991←31 Years→20 Sep 2022 | Dissolved | |
| Instrotech Holdings Limited Director • Unreported | 1 Jan 1970←55 Years→Current | Active | |
