| Company | Timeline | Status | |
| C. & T. Publications Limited Director • Consultant Engineer | 19 Aug 1991←5 Years→24 Oct 1996 | Active | |
| Churchill Heritage Limited(The) Director • Consultant Engineer | 30 Apr 1991←7 Years→1 Jul 1998 | Active | |
| Conport Structures Limited Director • Consultant | 25 Dec 1990←11 Years→18 Mar 2002 | Active | |
