| Company | Timeline | Status | |
| Blue Diamond Machine Tools Limited Director • Engineer | 30 Jun 1991←8 Years→31 May 2000 | Active | |
| Blue Diamond Engineering Limited Director • Engineer | 30 Jun 1991←8 Years→31 May 2000 | Active | |
| Blue Diamond Engineering Limited Director • Unreported | 1 Jan 1970←30 Years→31 May 2000 | Active | |
