| Company | Timeline | Status | |
| Sia Abrasives Holding Limited Director • Chief Executive Officer | 6 Apr 2006←8 Months→31 Dec 2006 | Active | |
| Sia Abrafoam Limited Director • Company Director | 2 Nov 2005←1 Year 1 Month→31 Dec 2006 | Active | |
| Sia Fibral Limited Director • Ceo | 25 Apr 2001←5 Years→1 Jan 2007 | Active | |
| Sia Abrasives (G.B.) Ltd Director • Chief Executive Officer | 25 Feb 1992←14 Years→14 Feb 2007 | Active | |
