| Company | Timeline | Status | |
| Radio Technology Holdings Limited Director • Accountant | 12 Aug 1998←3 Years→30 Sep 2001 | Active | |
| Airsys Communications Technology Limited Director • Accountant | 22 Dec 1997←3 Years→14 Sep 2001 | Active | |
| Small Business Limited Director • Accountant | 1 Oct 1991←34 Years→Current | Liquidation | |
