| Company | Timeline | Status | |
| Anglo American Plc Director • Director | 18 Mar 1999←9 Months→31 Dec 1999 | Active | |
| Sibanye UK Limited Director • Technical Director | 9 May 1996←11 Months→29 Apr 1997 | Active | |
| Cleveland Potash Limited Director • Company Director | 13 Dec 1993←6 Years→31 Dec 1999 | Active | |
| Tarmac Industrial Minerals Holdings Limited Director • Technical Director | 30 Sep 1992←16 Days→16 Oct 1992 | Dissolved | |
Anmercosa Sales Limited Director • Technical Director | 27 Jun 1991←6 Years→25 Mar 1998 | Dissolved | |
