| Company | Timeline | Status | |
Sims Rail Limited Director • Railway Engineer/technical Director | 11 Nov 2014←3 Years→2 Jan 2018 | Dissolved | |
| Par Design Limited Director • Unreported | 21 Feb 2003←22 Years→Current | Active | |
Loftus Underground Limited Director • Railway Engineer | 1 Apr 2002←16 Years→9 Oct 2018 | Dissolved | |
| Signalling Installation & Maintenance Services Limited Director • Railway Engineer | 18 Aug 1997←22 Years→31 Aug 2019 | Active | |
