| Company | Timeline | Status | |
| Schiedel Chimney Systems Limited Director • General Manager | 1 Oct 2007←3 Years→15 Jul 2011 | Active | |
| Schiedel Rite-Vent Limited Director • General Manager | 1 Oct 2007←3 Years→15 Jul 2011 | Active | |
| Rite-Vent Holdings Limited Director • General Manager | 1 Oct 2007←3 Years→15 Jul 2011 | Active | |
| Rite-Vent Limited Director • General Manager | 1 Oct 2007←3 Years→15 Jul 2011 | Active | |
