| Company | Timeline | Status | |
Ecoheat Systems GB Limited Director • Director | 30 Mar 2009←7 Years→20 Sep 2016 | Dissolved | |
| Derek Austin Heating Limited Director • Bookkeeper | 31 Aug 2004←21 Years→Current | Active | |
| Derek Austin Heating Limited Director • Bookkeeper | 31 Aug 2004←20 Years→31 Mar 2025 | Active | |
