| Company | Timeline | Status | |
| Jackmark International Limited Director • Engineer | 12 Dec 1995←12 Years→19 Jan 2008 | Active | |
Jacksons Power Transmission Limited Director • Engineer | 14 Nov 1991←2 Years 7 Months→16 Jun 1994 | Dissolved | |
| Jackmark Engineering Limited Director • Engineer | 13 Nov 1991←16 Years→19 Jan 2008 | Active | |
