| Company | Timeline | Status | |
| Dorchester House Limited Director • Managing Director | 27 Apr 1998←6 Years→13 Aug 2004 | Active | |
| Costain International Limited Director • Chartered Engineer | 1 Jan 1995←9 Months→30 Sep 1995 | Dissolved | |
| Costain Engineering & Construction Limited Director • Chartered Engineer | 1 Nov 1994←11 Months→30 Sep 1995 | Active | |
Costain Building Products Limited Director • Chartered Engineer | 1 Jan 1993←1 Year 10 Months→31 Oct 1994 | Dissolved | |
