| Company | Timeline | Status | |
| Blackhill Investments Limited Director • Accountant | 24 May 2006←19 Years→Current | Active | |
| Traffic Technology Research Limited Director • Director | 30 Jul 1999←26 Years→Current | Active | |
| Pullman Court Residents Association Limited Director • Electrical Engineer | 28 May 1992←6 Years→5 Nov 1998 | Active | |
| B.D.L. Systems Limited Director • Electronics Engineer | 26 Sep 1991←15 Years→30 Sep 2006 | Dissolved | |
