| Company | Timeline | Status | |
| Synergy Rail Limited Director • Chartered Engineer | 10 Mar 2010←2 Years 8 Months→30 Nov 2012 | Active | |
| Technical Programme Delivery Ltd Director • Director | 1 Nov 2009←15 Years→Current | Active | |
| Holme Street Estates Limited Director • Chartered Engineer | 18 Jul 2005←16 Years→21 Dec 2021 | Dissolved | |
| Holme Street Estates Limited Secretary • Unreported | 18 Jul 2005←16 Years→21 Dec 2021 | Dissolved | |
| Ricardo Rail Limited Director • Engineer | 1 May 1997←10 Years→30 Apr 2007 | Active | |
