| Company | Timeline | Status | |
| Hitchin Girls' School Director • Structural Engineer | 17 Oct 2013←4 Years→16 Oct 2017 | Active | |
| MSDA Limited Director • Design Engineer | 20 Jun 1997←26 Years→5 Sep 2023 | Dissolved | |
| Cromwell Court Management (Letchworth) Limited Director • Aerospace Design Engineer | 25 Aug 1992←3 Years→31 Oct 1995 | Active | |
