| Company | Timeline | Status | |
| Field Systems Designs Holdings Limited Director • Engineer | 3 Sep 1998←4 Years→31 Mar 2003 | Active | |
| Field Systems Designs Limited Director • Engineer | 22 Sep 1994←7 Years→1 Nov 2001 | Active | |
| Tower Tool Company Limited Director • Engineer | 16 Oct 1991←13 Years→30 Nov 2004 | Active | |
