| Company | Timeline | Status | |
| DG Associates Ltd Director • Engineering Consultant | 14 May 2024←1 Year 5 Months→Current | Active | |
| D Guest Associates Ltd Director • Engineering Consultant | 8 Aug 2019←1 Year 9 Months→18 May 2021 | Dissolved | |
Turner Guest Associates Ltd Director • Director | 5 May 2010←6 Years→31 May 2016 | Dissolved | |
| Birwelco Limited Director • Design Engineering | 13 Jul 2004←6 Years→1 Aug 2010 | Active | |
