| Company | Timeline | Status | |
| Heather Parker Projects Ltd Director • Manager | 20 Jul 2011←10 Years→10 Aug 2021 | Dissolved | |
Ham Hydro Community Interest Company Director • Energy Consultant | 21 Apr 2010←5 Years→19 Jan 2016 | Dissolved | |
| Sustainia Ltd Director • Director | 22 Sep 2009←16 Years→Current | Active | |
| Thames Renewable Energy Ltd Secretary • Unreported | 17 Oct 2007←1 Year 11 Months→6 Oct 2009 | Active | |
| Thames Renewable Energy Ltd Director • Consultant | 16 Oct 2005←3 Years→6 Oct 2009 | Active | |
