| Company | Timeline | Status | |
| Air Leakage Testing Limited Director • Engineer | 25 Feb 2002←15 Years→1 Dec 2017 | Active | |
| Seals & Gaskets Limited Director • Engineer | 15 Oct 1991←34 Years→Current | Active | |
| Reliable Spring & Manufacturing Company Limited(The) Director • Engineer | 15 Oct 1991←34 Years→Current | Active | |
