| Company | Timeline | Status | |
| Pi (Physik Instrumente) Ltd Secretary • Unreported | 30 Jan 2008←3 Years→30 Nov 2011 | Active | |
| Polytec Limited Director • Director | 17 Dec 2007←8 Years→30 Dec 2015 | Active | |
| Polytec P.I. Limited Director • Applied Chemist | 29 Dec 2006←8 Years→18 Dec 2015 | Active | |
| Ometron Limited Director • Director | 20 Oct 2003←11 Years→1 Oct 2015 | Active | |
| Polytec P.I. Limited Secretary • Unreported | 13 May 1999←7 Years→29 Dec 2006 | Active | |
| Lambda Photometrics Limited Director • Company Director | 16 May 1991←24 Years→30 Dec 2015 | Active | |
