| Company | Timeline | Status | |
| BM Gauge Calibration And Sales Limited Director • Calibration Engineer | 2 May 2017←3 Years→1 Mar 2021 | Active | |
BM Gauges Limited Director • Calibration Engineer | 12 Mar 2003←16 Years→9 Jul 2019 | Dissolved | |
| York Metrology Limited Director • Engineer | 1 Aug 1991←9 Years→28 Feb 2001 | Active | |
