| Company | Timeline | Status | |
| Sustainable Engine Systems Ltd Director • Consultant | 14 Dec 1991←11 Months→1 Dec 1992 | Active | |
| Verco Advisory Services Limited Director • Engineer | 13 Mar 1991←3 Years→1 Sep 1994 | Active | |
| Sustainable Engine Systems Ltd Director • Unreported | 1 Jan 1970←22 Years→1 Dec 1992 | Active | |
