| Company | Timeline | Status | |
| Sumac Manufacturing (Holdings) Limited Director • Engineer | 8 Oct 2019←6 Years→Current | Active | |
| Sumac Precision Engineering Limited Director • Engineer | 18 Sep 1995←30 Years→Current | Active | |
| Sumac Precision Engineering Limited Secretary • Engineer | 18 Sep 1995←19 Years→15 Jun 2015 | Active | |
