| Company | Timeline | Status | |
| Zero Bills Home Limited Director • Architect | 19 Aug 2015←1 Year 2 Months→18 Oct 2016 | Dissolved | |
| Zero Energy Boat Ltd Director • Architect | 6 Jul 2009←1 Month→14 Aug 2009 | Active | |
| Low Carbon Trust Ltd Director • Unreported | 12 Jun 2002←23 Years→Current | Active | |
