| Company | Timeline | Status | |
Edge Media And Research Limited Director • Director | 30 Apr 2007←9 Years→19 Mar 2017 | Dissolved | |
| Iop Publishing Limited Director • Publisher | 23 Nov 2001←4 Years→31 Jul 2006 | Active | |
| Iop Educational Publishing Limited Director • Publisher | 3 Sep 2001←4 Years→31 Jul 2006 | Active | |
