| Company | Timeline | Status | |
| Chemtech International Limited Director • Vice President | 1 Jan 1997←19 Years→6 Jul 2016 | Active | |
| Chemtech Industries Limited Director • Director | 27 Oct 1991←24 Years→6 Jul 2016 | Active | |
| Chemtech Industries Limited Director • Unreported | 1 Jan 1970←46 Years→6 Jul 2016 | Active | |
