| Company | Timeline | Status | |
| Mott Macdonald Limited Director • Chartered Engineer | 9 May 1992←6 Years→30 Sep 1998 | Active | |
| Williamson Technical Services Limited Director • Chartered Engineer | 3 Aug 1989←10 Months→15 Jun 1990 | Liquidation | |
| Williamson Technical Services Limited Secretary • Unreported | 3 Aug 1989←10 Months→15 Jun 1990 | Liquidation | |
