| Company | Timeline | Status | |
| Retherm Limited Director • Engineer | 23 Jul 2007←1 Year 8 Months→25 Mar 2009 | Dissolved | |
| Retherm Limited Secretary • Unreported | 23 Jul 2007←1 Year 8 Months→25 Mar 2009 | Dissolved | |
| PTC Engineering Limited Director • Engineer | 24 Oct 2005←20 Years→Current | Active | |
| PT Clarke Limited Secretary • Engineer | 30 Nov 2001←23 Years→Current | Active | |
| PT Clarke Limited Director • Engineer | 30 Nov 2001←23 Years→Current | Active | |
