| Company | Timeline | Status | |
| Richinfo Limited Director • Company Secretary | 26 Mar 2013←12 Years→Current | Active | |
| Airmic Limited Director • Manager | 6 Jun 2011←8 Years→8 Apr 2020 | Active | |
| Fujitsu Retirement Management Services Secretary • Unreported | 24 Apr 2006←9 Years→1 Mar 2016 | Active | |
| Fujitsu Retirement Services Limited Secretary • Unreported | 24 Apr 2006←9 Years→1 Mar 2016 | Active | |
| Fujitsu Services Overseas Holdings Limited Secretary • Unreported | 3 Jan 2006←5 Years→30 Mar 2011 | Active | |
| Fujitsu Services Holdings Plc Secretary • Unreported | 3 Jan 2006←10 Years→1 Mar 2016 | Active | |
| Fujitsu Services Limited Secretary • Unreported | 3 Jan 2006←4 Years→16 Sep 2010 | Active | |
| Airmic Limited Director • Manager | 3 Dec 2004←3 Years→13 Mar 2008 | Active | |
| Nortel Networks Optical Components Limited Secretary • Unreported | 14 Jun 1993←1 Year 7 Months→31 Jan 1995 | Active | |
| STC Secretary • Unreported | 15 May 1993←10 Months→11 Mar 1994 | Dissolved | |
