| Company | Timeline | Status | |
| Ampersand Design Limited Secretary • Chief Technician | 7 Oct 1994←5 Months→10 Mar 1995 | Active | |
| Ampersand Design Limited Director • Chief Technician | 7 Oct 1994←5 Months→10 Mar 1995 | Active | |
| Flightline Support Limited Director • Consultant | 22 Mar 1992←14 Years→1 Aug 2006 | Active | |
