| Company | Timeline | Status | |
| Advanced Propulsion Centre UK Limited Director • Company Director  | 1 Jul 2014←11 Years→Current  | Active  | |
Diesel Motorsport Limited Director • Chartered Engineer  | 22 Apr 2008←11 Years→14 May 2019  | Dissolved  | |
| Oulton-Lee Research Limited Director • University Professor  | 30 Apr 2003←22 Years→Current  | Active  | |
| Oulton-Lee Research Limited Secretary • Unreported  | 22 May 1997←28 Years→Current  | Active  | |
