| Company | Timeline | Status | |
| Costain Group Plc Director • Civil Engineer | 27 Sep 1995←10 Months→31 Jul 1996 | Active | |
| Costain International Limited Director • Civil Engineer | 14 Aug 1995←2 Months→18 Oct 1995 | Dissolved | |
| Costain Engineering & Construction (Overseas) Limited Director • Civil Engineer | 28 Feb 1993←1 Year 8 Months→1 Nov 1994 | Active | |
| Costain Engineering & Construction Limited Director • Civil Engineer | 28 Feb 1993←5 Years→30 Apr 1998 | Active | |
| Costain Management Design Limited Director • Civil Engineer | 28 Feb 1993←1 Year 10 Months→1 Jan 1995 | Dissolved | |
| Costain Building & Civil Engineering Limited Director • Civil Engineer | 28 Feb 1993←5 Years→30 Apr 1998 | Active | |
| Costain Limited Director • Civil Engineer | 28 Feb 1993←5 Years→30 Apr 1998 | Active | |
| Costain International Limited Director • Civil Engineer | 28 Feb 1993←1 Year 10 Months→1 Jan 1995 | Dissolved | |
| Costain Construction Limited Director • Unreported | 1 Jan 1970←25 Years→1 Jan 1995 | Active | |
