| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| PROBLEMATICS LIMITED | SC032616 | 16/05/1988 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BALFOUR BEATTY RAIL TRACK SYSTEMS LIMITED | 02311350 | 24/09/1991 | 23/07/1991 | Not Trading |
| KENNEDY & DONKIN TRANSPORTATION LIMITED | 01615781 | 01/07/1996 | 04/04/2002 | Dissolved |
| Kennedy & Donkin Overseas Ltd | 02058508 | 02/08/2000 | 04/04/2002 | Dissolved |
| Kennedy & Donkin Trustees Ltd | 02336148 | 12/02/2001 | 04/04/2002 | Dissolved |
| Maunsell Parsons Brinckerhoff Ltd | 02232027 | 28/06/1999 | 04/12/2002 | Dissolved |
| Northern Track Renewals Co Ltd | 02995377 | 28/11/1994 | 23/05/1996 | Dissolved |
| PARSONS BRINCKERHOFF CONSTRUCTORS LIMITED | 04022339 | 11/05/2001 | 04/04/2002 | Dissolved |
| PARSONS BRINCKERHOFF INVESTMENTS LIMITED | 03599313 | 28/06/2000 | 11/05/2001 | Dissolved |
| PB LTD | 00656314 | 05/09/1997 | 04/04/2002 | Not Trading |
| Parsons Brinckerhoff (Europe) Ltd | 02887298 | 16/04/1999 | 04/04/2002 | Dissolved |
| Parsons Brinckerhoff Aviation Ltd | 04115247 | 12/02/2001 | 04/04/2002 | Dissolved |
| Parsons Brinckerhoff Infrastructure Ltd | 04022351 | 05/07/2000 | 04/04/2002 | Dissolved |
| Parsons Brinckerhoff Programme Management Ltd | 03919454 | 11/05/2001 | 04/04/2002 | Dissolved |
| RECRUIT CONSULT LIMITED | 05367114 | 16/02/2005 | 15/05/2016 | Dissolved |
| RUST CONSULTING LIMITED | 02778272 | 01/07/1996 | 04/04/2002 | Dissolved |
| SHAW-PETRIE LIMITED | SC018493 | 16/05/1988 | 16/01/1995 | Not Trading |