| Company | Timeline | Status | |
| Shackerstone Railway Society Limited Director • Signal Engineer | 2 Apr 2005←10 Months→13 Feb 2006 | Active | |
| York Caravan Equipments Limited Director • Signal Engineer | 2 Apr 2005←10 Months→13 Feb 2006 | Active | |
| D318 Limited Director • Signal Engineer | 31 Dec 1991←34 Years→Current | Active | |
| Distance Learning Limited Director • Signals Engineer | 30 Sep 1989←36 Years→Current | Active | |
