| Company | Timeline | Status | |
| R John W Limited Director • Engineer | 29 Jul 2013←12 Years→Current | Active | |
| Radar Tank Gauging Ltd Secretary • Unreported | 1 Oct 1999←26 Years→Current | Active | |
| Radar Tank Gauging Ltd Director • Sales Manager | 29 Sep 1999←26 Years→Current | Active | |
