| Company | Timeline | Status | |
| Kilofrequency Limited Director • Electronics Engineer | 14 Apr 2014←11 Years→Current | Active | |
| Coborn Engineering Company Limited Director • Electronics Engineer | 6 Apr 2001←24 Years→Current | Liquidation | |
| Trochilics Limited Director • Electronics Engineer | 6 Apr 2001←20 Years→28 Apr 2021 | Active | |
