| Company | Timeline | Status | |
| BKT Group Holdings Limited Director • Engineer  | 3 Sep 2002←1 Year→1 Oct 2003  | Active  | |
| Magnetic Shields Limited Director • Engineer  | 3 Sep 2002←1 Year→1 Oct 2003  | Active  | |
| Colsur Materials Limited Director • Engineer  | 18 Jun 1999←4 Years→1 Oct 2003  | Active  | |
