- Balfour Beatty - Edinburgh, Pontefract, Manchester - Shopping Centres, Halls of Residence, Schools, Fire Stations, Hospitals, etc
- Ballast Wiltshier - Leeds, Winchester, Bromley, Glasgow, Nottingham - all projects from Housing to Hospitals and Schools.
- Bilfinger & Berger UK Ltd
- Blyth & Blyth - Project Management
- Bowen Construction Ireland - Hospitals
- BSS Ireland
- Carillion
- Consafe - North Sea Platform Constructor
- Consort Health Care - Hospitals
- Cooke and Kettyle - Northern Ireland Warm Homes Scheme
- David Brown Pumps - Bespoke Pump Manufacture
- Devonport Management Ltd - Nuclear related projects
- English Partnerships - Millennium Dome London
- ENTEC
- Fyvie DMC Ltd
- Geoffrey Osborne
- Hampshire Waste
- Heery International - Edinburgh, London - Edinburgh Airport, Bank of England, Hospitals [6], etc etc
- Heron Bros
- IDC - Ireland, France - Intel Fabrication Plants
- Interserve
- John Mowlem Construction plc (Leeds)
- John Sisks - Islington
- Kier Build - Bournemouth, Colmore Square, etc
- Laing Constyruction & Management - Scotland, England - British Airways Cargo Centre,
- Medite
- Motherwell Bridge Projects - numerous Tank Farms, Refineries, etc
- Mowlem - Water Engineering Ltd
- Mowlem Construction - The Earth Centre, etc
- North Lanark Council - Roads and Bridges
- ODL - Manuals for North Sea Platforms
- Onyx Sheffield
- O'Rourke Civil Engineering - Glasgow Airoport Car Park, etc etc
- RSP Consulting Engineers - all projects
- Scott Wilson Kirkpatrick
- Sime Malloch
- Standard Life - Construction & Property Management
- Stopford Projects Ltd
- Swanke Hayden Connell
- Teknica (UK) Ltd
- Tilbury Douglas - Sheffield Schools, Prisons, Detention Centres, Hospitals, etc etc
- Tyco Engineering Services
- Veolia (Onyx) - Construction Management of Waste Dispoasl Plants - Sheefield, Nottingham, Hampshire, etc etc
- Westinghouse Signals - Glasgow - Low level signalling, etc
- Wood Group (AEA with BP)
- Wormald Control Systems

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