| Company | Timeline | Status | |
| K G Coating Limited Director • Engineer | 20 Oct 1994←10 Years→14 Oct 2005 | Active | |
| T.W. Financing Limited Director • High Vacuum Engineer | 5 Nov 1991←4 Years→3 Oct 1996 | Active | |
| Scanwel Limited Director • High Vacuum Engineer | 9 Jul 1991←3 Years→1 Apr 1995 | Active | |
