| Company | Timeline | Status | |
| Railway And Canal Historical Society (The) Director • Unreported  | 15 Apr 2020←5 Years→Current  | Active  | |
| Piccadilly Management Company (York) Limited Director • Chartered Civil Engineer  | 6 Aug 2012←4 Years→4 Apr 2017  | Active  | |
Higton Consulting Limited Director • Chartered Civil Engineer  | 16 May 2011←8 Years→13 Aug 2019  | Dissolved  | |
| Ove Arup & Partners Limited Director • Railways Engineer  | 1 Apr 1999←9 Years→31 Jul 2008  | Active  | |
| Ove Arup & Partners International Limited Director • Railways Engineer  | 1 Apr 1999←2 Years 9 Months→1 Jan 2002  | Active  | |
