| Company | Timeline | Status | |
| Maxswell Limited Director • Engineer | 27 Oct 2008←4 Years→20 Mar 2013 | Dissolved | |
| Emasco Limited Director • Design Engineer | 26 Jun 1998←27 Years→Current | Active | |
| Emasco Limited Director • Design Engineer | 26 Jun 1998←27 Years→30 Jun 2025 | Active | |
