| Company | Timeline | Status | |
| Carbon Limiting Technologies Limited Director • Management Consultant | 2 Nov 2006←18 Years→Current | Active | |
| Tchen And Company Limited Secretary • Unreported | 9 May 2006←19 Years→Current | Active | |
| Tchen And Company Limited Director • Management Consultant | 9 May 2006←19 Years→Current | Active | |
| Grenville Mansions Residents Limited Director • Management Consultant | 11 Apr 1995←1 Year 10 Months→7 Feb 1997 | Active | |
