| Company | Timeline | Status | |
| The British Society For The History Of Mathematics Director • Unreported | 4 Apr 2025←7 Months→Current | Active | |
| Greenwich Pictures Ltd Director • Unreported | 3 Mar 2011←14 Years→Current | Active | |
Financial Programming Limited Director • Consultant | 23 Jan 2003←11 Years→15 Apr 2014 | Dissolved | |
