| Company | Timeline | Status | |
| Certuss Group Holdings Limited Director • Engineer | 31 Mar 2000←3 Years→15 Mar 2004 | Active | |
| Certuss Mechanical Services Limited Director • Director | 31 Aug 1991←12 Years→31 Mar 2004 | Active | |
| Certuss Mechanical Services Limited Secretary • Unreported | 31 Aug 1991←12 Years→31 Mar 2004 | Active | |
| Certuss (UK) Limited Director • Director | 18 Jul 1991←12 Years→31 Mar 2004 | Active | |
| Certuss (UK) Limited Secretary • Unreported | 18 Jul 1991←12 Years→15 Mar 2004 | Active | |
