| Company | Timeline | Status | |
| Hut 6 Security Limited Director • Technology Adviser | 19 Apr 2017←5 Years→6 Sep 2022 | Active | |
| Learnium Limited Director • Business Executive | 1 Apr 2015←8 Years→6 Jun 2023 | Liquidation | |
| Sanibel Solutions Limited Director • Director | 31 Mar 2015←10 Years→Current | Active | |
Filbo Limited Director • Director | 15 Apr 2009←7 Years→6 Sep 2016 | Dissolved | |
| Ubiquity Software Corporation Limited Secretary • Technical Director | 16 Jun 1993←3 Years→5 Mar 1997 | Active | |
| Ubiquity Software Corporation Limited Director • Technical Director | 12 Nov 1992←14 Years→22 May 2007 | Active | |
| Chesterfield House Clifton Limited Director • Sopftware Eng | 13 Dec 1991←5 Years→1 Apr 1997 | Active | |
