| Company | Timeline | Status | |
| Bernard Hooper Engineering Limited Director • Chartered Engineer | 28 Feb 1992←5 Years→14 Sep 1997 | Active | |
| Stepped Piston Engines Limited Director • Engineer | 2 Dec 1988←4 Years→12 Nov 1993 | Active | |
| Stepped Piston Engines Limited Director • Unreported | 1 Jan 1970←23 Years→12 Nov 1993 | Active | |
