| Company | Timeline | Status | |
| Edsac Replica Project Director • Company Director | 2 Apr 2012←13 Years→12 Aug 2025 | Dissolved | |
| Tnmoc Trading Limited Director • Comp Director | 10 Mar 2009←16 Years→Current | Active | |
| Studenthealth Ltd Director • Manager | 7 Dec 2006←1 Year 11 Months→21 Nov 2008 | Dissolved | |
| Studenthealth Ltd Secretary • Unreported | 6 Dec 2006←1 Year 11 Months→21 Nov 2008 | Dissolved | |
| Savience Limited Director • Consultant | 5 Dec 2005←20 Years→Current | Active | |
| The National Museum Of Computing Director • Company Director | 1 Apr 2005←20 Years→Current | Active | |
| Newwater Consulting Ltd Director • Technical Architect | 1 Aug 2004←21 Years→Current | Active | |
| Newwater Consulting Ltd Secretary • Manager | 22 Jul 2002←23 Years→Current | Active | |
| Savience Limited Secretary • Manager | 31 Jan 2001←24 Years→Current | Active | |
Exeter Systems Limited Director • Technical Director | 17 Jul 2000←1 Year 4 Months→6 Dec 2001 | Dissolved | |
