| Company | Timeline | Status | |
| Columba Systems Limited Director • Technology Director | 1 Sep 2004←8 Years→28 Feb 2013 | Active | |
| 71 Sunnyside Road Management Limited Secretary • Unreported | 1 Feb 2003←9 Years→21 Jan 2013 | Active | |
| 71 Sunnyside Road Management Limited Director • Chief Technology Officer | 16 Mar 2000←12 Years→21 Jan 2013 | Active | |
