| Company | Timeline | Status | |
| Systems Studies Limited Director • Teacher | 9 Aug 1991←34 Years→Current | Active | |
| Systems Studies Limited Secretary • Teacher | 9 Aug 1991←34 Years→Current | Active | |
JM Circuits Limited Director • Teacher | 9 Aug 1991←7 Years→30 Oct 1998 | Dissolved | |
JM Circuits Limited Secretary • Unreported | 9 Aug 1991←7 Years→23 Oct 1998 | Dissolved | |
