| Company | Timeline | Status | |
| Optima International Limited Director • Engineering | 15 Feb 2005←20 Years→Current | Active | |
| Optima International Limited Secretary • Engineering | 15 Feb 2005←20 Years→Current | Active | |
| Wedge Wire Screens Limited Secretary • Bus Devt Manager | 7 Sep 2001←24 Years→Current | Active | |
| Tilewind Limited Secretary • Bus Devt Manager | 7 Sep 2001←6 Years→22 Oct 2007 | Active | |
