| Company | Timeline | Status | |
| Promethean World Limited Director • Director | 6 Jan 2010←2 Years 8 Months→21 Sep 2012 | Active | |
Promethean Technology Limited Director • Chief Executive Officer | 10 Dec 2007←4 Years→21 Sep 2012 | Dissolved | |
| Promethean (Holdings) Limited Director • Chief Executive Officer | 10 Dec 2007←4 Years→21 Sep 2012 | Active | |
| Promethean Limited Director • Chief Executive Officer | 10 Dec 2007←4 Years→21 Sep 2012 | Active | |
| Chalkfree Limited Director • Chief Executive Officer | 18 Sep 2007←5 Years→21 Sep 2012 | Active | |
