| Company | Timeline | Status | |
| Norton Gate Management Limited Secretary • Retired | 24 Jul 2008←16 Years→14 Jan 2025 | Dissolved | |
| Norton Gate Management Limited Director • Retired | 24 Jul 2008←16 Years→14 Jan 2025 | Dissolved | |
| The British Society For The History Of Mathematics Director • Teacher | 10 Dec 2006←9 Years→31 Dec 2015 | Active | |
