| Company | Timeline | Status | |
| J. P. Springthorpe & Co. Limited Director • Quarry Plant Engineer | 4 Oct 2004←19 Years→28 Mar 2024 | Active | |
| Wileman Engineers Limited Director • Unreported | 31 Jan 1999←26 Years→Current | Active | |
| Wileman Engineers Limited Secretary • Quarry Plant Engineer | 31 Jan 1999←8 Years→20 Jul 2007 | Active | |
