| Company | Timeline | Status | |
| Gyrometric Systems Limited Director • Engineer | 27 Jun 2006←19 Years→Current | Active | |
| Gyrometric Systems Limited Secretary • Engineer | 27 Jun 2006←19 Years→Current | Active | |
| Vollmer UK Limited Director • Engineer | 31 Dec 1990←11 Months→3 Dec 1991 | Active | |
