| Company | Timeline | Status | |
| Schnozz Limited Director • Director | 14 Jun 2011←10 Years→7 Jun 2022 | Dissolved | |
| Stepped Piston Engines Limited Director • Director | 9 Nov 2010←15 Years→Current | Active | |
| OSP Engines Limited Director • Engineer | 1 Sep 2009←16 Years→Current | Active | |
| Jabus Engineering Limited Secretary • Engineer | 1 Oct 2008←17 Years→11 Nov 2025 | Dissolved | |
| Diamedica Limited Director • Consulting Engineer | 22 Mar 2004←2 Years 10 Months→7 Feb 2007 | Active | |
| Stepped Piston Engines Limited Director • Director/consultant | 20 Jun 2003←3 Years→13 Oct 2006 | Active | |
| Sarchex Limited Secretary • Chartered Engineer | 17 Jun 2002←23 Years→Current | Active | |
| OSP Engines Limited Director • Chatered Engineer | 20 Feb 2002←4 Years→13 Oct 2006 | Active | |
| The Newcomen Society For The Study Of The History Of Engineering And Technology Director • Consulting Engineeer | 14 Oct 1998←3 Years→9 Oct 2002 | Active | |
| Jabus Engineering Limited Director • Director | 18 May 1993←32 Years→11 Nov 2025 | Dissolved | |
