| Company | Timeline | Status | |
| Armson-Boult Ltd Director • Engineer | 28 Apr 2015←10 Years→Current | Active | |
| Armson-Boult Ltd Director • Engineer | 28 Apr 2015←9 Years→1 Apr 2025 | Active | |
| Concorde Tool & Gauge Ltd Secretary • Unreported | 17 Apr 2008←17 Years→Current | Active | |
| Concorde Tool & Gauge Ltd Director • Engineer | 17 Apr 2008←17 Years→Current | Active | |
| Matrix Gauge & Tool Limited Director • Engineer | 3 Mar 1999←26 Years→Current | Active | |
| Mark Boult Ltd Director • Engineer | 28 Dec 1990←34 Years→Current | Active | |
| Mark Boult Ltd Secretary • Unreported | 28 Dec 1990←34 Years→Current | Active | |
