| Company | Timeline | Status | |
| Marine Design International Limited Director • Naval Architect | 1 Jul 2015←3 Years→30 Nov 2018 | Active | |
| Mylne Ltd Director • Unreported | 7 Feb 2008←17 Years→Current | Active | |
| David Gray Design Ltd Director • Unreported | 21 Jun 1999←26 Years→Current | Active | |
