| Company | Timeline | Status | |
| Boastic Limited Director • Consultant | 29 Jul 2016←8 Years→7 Jan 2025 | Dissolved | |
| Goldhart Limited Director • It Consultant | 11 Jul 2008←13 Years→26 Oct 2021 | Dissolved | |
| Dataline Software Limited Director • Software Designer | 30 Mar 1992←1 Year 10 Months→1 Feb 1994 | Active | |
| Ringdale Deutschland Limited Director • Software Designer | 17 Oct 1991←6 Years→6 Nov 1997 | Active | |
