| Worley Parsons |
Bovis Lend Lease |
| Acumen Engineering |
National Grid Company plc |
| Multiplex Construction Ltd |
Rotary Northern Ltd |
| Studio Map Ltd |
Kier Northern Ltd |
| Interserve Industrial Services Ltd |
Jarvis Rail Projects Ltd |
| Ocon Construction Ltd |
Jack Lunn Ltd |
| William Verry Ltd |
Houseman and Falshaw Ltd |
| HACS Construction Ltd |
York House Construction Ltd |
| FP Construction Ltd |
Hamon Thermal |
| MITIE (Leeds) Engineering Services Ltd |
MITIE (North East) Engineering Services Ltd |
| West Leeds Construction Services Ltd |
Howard Civil Engineering Ltd |
| Harry Watson Builders Ltd |
Harry Kindred Construction Ltd |
| GBH Utilities Ltd |
Dickinson Decorators Ltd |
| Drawn Metal Ltd |
Dane Architectural |
| Smith Electrical Contractors Ltd |
Balvac Whitley Moran Ltd |
| Hill Cannon |
Jackson Coulson Partnership |
| Syncro Ltd |
|
