| Company | Timeline | Status | |
| Crabtree Limited Director • Research Metallurgist | 30 Nov 1994←31 Years→Current | Active | |
| Crabtree Limited Director • Research Metallurgist | 30 Nov 1991←2 Years 2 Months→3 Feb 1994 | Active | |
| Crabtree Limited Director • Unreported | 1 Jan 1970←24 Years→3 Feb 1994 | Active | |
