| Company | Timeline | Status | |
| Ursa Scientific Ltd Director • Scientific Instrument Consultant | 23 Sep 2017←8 Years→Current | Active | |
| PSP Vacuum Technology Ltd Director • Service Engineer | 19 Jan 1993←32 Years→Current | Active | |
| PSP Vacuum Technology Ltd Secretary • Service Engineer | 19 Jan 1993←32 Years→Current | Active | |
