| Company | Timeline | Status | |
| Kepler Aerospace (UK) Ltd Director • Engineer | 4 Oct 2019←1 Year 9 Months→13 Jul 2021 | Dissolved | |
GJD Aircraft Trading Ltd Director • Engineer | 5 Jan 2017←2 Years 3 Months→23 Apr 2019 | Dissolved | |
| Cornwall Aviation Heritage Centre Limited Director • Director | 29 May 2015←9 Years→3 Dec 2024 | Dissolved | |
| Plane Designs Ltd Director • Managing Director | 5 Jul 2011←14 Years→Current | Active | |
| GJD Aerotech Limited Director • Aircraft Engineer | 26 Nov 2007←17 Years→Current | Active | |
| GJD Services Limited Director • Aircraft Engineer | 14 Jan 2004←21 Years→Current | Active | |
