| Company | Timeline | Status | |
| Well-Factored Software Ltd Director • Software Developer | 5 May 2015←8 Years→12 Mar 2024 | Dissolved | |
| Wiredthing Limited Director • Computer Programmer | 9 Mar 2009←6 Years→1 May 2015 | Dissolved | |
| Greycourt Software Limited Director • Computer Programmer | 10 May 1993←32 Years→Current | Active | |
| Greycourt Software Limited Secretary • Computer Programmer | 10 May 1993←11 Years→18 Aug 2004 | Active | |
