| Company | Timeline | Status | |
| The Porsche Owners Club (UK) Limited Director • Consulting Engineer | 17 Jun 2021←1 Year 2 Months→24 Aug 2022 | Active | |
| Porsche Club GB Motorsport Limited Director • Unreported | 14 Apr 2019←6 Years→Current | Active | |
| Gmund Heritage Limited Director • Consulting Engineer | 5 Dec 2017←4 Years→22 Jun 2022 | Active | |
Radical Systems Limited Director • Director | 10 Feb 2009←1 Year 7 Months→30 Sep 2010 | Dissolved | |
Steritrox Limited Director • Marketer | 1 Jan 2009←1 Year 9 Months→30 Sep 2010 | Dissolved | |
| Mark Hamilton Consulting Limited Director • Business Marketing Professiona | 9 Aug 2004←19 Years→7 Nov 2023 | Dissolved | |
