| Company | Timeline | Status | |
| Simpson Engineering Consultancy Ltd Director • Company Director | 6 Jul 2017←8 Years→Current | Active | |
| Pease House Ltd Director • Company Director | 30 May 2017←6 Years→11 Jul 2023 | Active | |
| Simpson Design Consultancy Ltd Director • Engineer | 12 Feb 2009←16 Years→Current | Active | |
