ABeam Consulting
Advantis Credit Ltd 
AMT-SYBEX
Asabell Ltd 
Balfour Beatty Utility Solutions
Barnsnape Consulting
BT Fleet
Business Stream
Capgemini UK
Central Networks 
Cognizant
Contigo Ltd
Drax Power Ltd 
DSTi Output
E.ON Engineering Academy
Echo Managed Services 
EDF Energy Networks
ElectraLink Limited 
EMC Computer System (UK) Ltd 
Engage Consulting Limited 
Enzen Global Ltd 
Ernst & Young
Europa
Face2Face Contact Ltd
G4S Utility Services
GCA
GDF SUEZ Energy UK  
GSF Sandylight
HCL Technologies
ICIS Heron
IMServ Europe Limited
Lane Clark & Peacock 
Logica 
Lowri Beck Services Ltd
Microsoft Ltd 
Morrison Utility Services


 

MWH UK Ltd
National Grid
National Grid Metering
New Grange Developments Ltd
North London Gas Alliance
Northern Gas Networks Limited
npower
Ordnance Survey
OnStream
Power2Contact
Progressive Media
Revenue Assurance
Roxburghe (UK) Limited
RR Donnelley Global Document Solutions
SAP UK Ltd
SAS
SBWWI
Scottish Water
SECOR Consultants
Severn Trent Water
Shell Gas Direct
South East Water
Southern Water
TATA Consultancy Services
TDX Group
Thames Water Utilities Ltd
uSwitch.com
Utilisoft Ltd
Veolia Water Outsourcing Ltd
Vertex
Wales & West Utilities
WaterAid
Wipro
Yorkshire Water
Zensar Technologies Ltd