| Company | Timeline | Status | |
| Simuserve Limited Director • Company Director | 21 May 1998←18 Years→27 Nov 2016 | Dissolved | |
| Cham Limited Director • Emeritus Professor/managing Di | 19 Jun 1991←25 Years→27 Nov 2016 | Active | |
| Cham Properties Limited Director • Emeritus Professor/managing Di | 19 Jun 1991←25 Years→27 Nov 2016 | Active | |
| Concentration Heat And Momentum Limited Director • Emeritus Professor/managing Di | 19 Jun 1991←25 Years→27 Nov 2016 | Active | |
