The following companies have Registered NAECI Category 3 and/or Other Work (which is not Categorised) at various UK locations.

Category 3 and Other Work

• Altrad Services Ltd
• Altrad Babcock Ltd
• Balfour Beatty Construction Services UK
• BGEN Ltd
• Bilfinger
• Brand Energy & Infrastructure Services UK Ltd
• Fieldcore
• Howden UK Ltd
• Jenkins & Davies Engineering
• Kaefer Ltd
• Laker Vent Engineering Ltd
• MII Engineering Ltd
• Palmers Scaffolding UK Ltd
• Rainham Industrial Services Ltd
• Siemens Power Generation Services
• Skelton Thomas Engineering Ltd
• TEi Ltd
• Unit Engineers & Constructors Ltd
• Trillium Flow
• Wood plc