Stark Energy Information Systems
Supplies energy information systems and services to major energy users and utility companies world-wide for energy management and automatic meter reading.
http://www.stark.co.uk/

ABB Energy Information Systems
Power T&D Solutions
http://www.abb.com/eis

Open Systems International
Open Systems International Provides Substation Automation Software & Solutions, Including SCADA Energy Management Systems, Generation Management Systems, & SCADA Distribution Management Systems.
http://www.osii.com/

SoftSmiths, Inc.
SoftSmiths creates, integrates and delivers business-critical transaction management systems and services that enable the energy industry to enhance reliability and profitability in the open access arena.
http://www.softsmiths.com

UK Energy Systems Trade Association
Giving a useful overview of the industry, and specific business addresses, ESTA is the primary trade association for UK "energy conservation" service providers (also known as demand-side management or energy management).
http://www.esta.org.uk/

Energy Research Inc.
Offers engineering analysis, management consulting, and scientific research in nuclear energy, conventional energy, risk management, probabilistic risk assessment and environmental systems to the nuclear industry.
http://www.eri-world.com/

Magna Search, Inc.
Recruiters specializing in the HVAC, HVAC CONTROLS, ENERGY MANAGEMENT, ENERGY SERVICES, BUILDING AUTOMATION SYSTEMS, FACILITIES MANAGEMENT, FINANCIAL SERVICES, and PUBLIC ACCOUNTING industries nationwide.
http://www.magnasearch.com/

Innovative Energy Partners
Innovative Energy Partners :: energy information management, energy supply management and energy systems management for corporate, commercial and industrial businesses.
http://www.innovativeenergypartners.com/

Envantage
Manchester based energy management consultants providing Action Energy, Energy Procurement and Climate Change Levy Management
http://www.envantage.co.uk

EDMI - Electronic Design and Manufacture International
Develops, manufactures and markets electronic energy meters, automatic meter reading systems, power quality monitoring devices and energy management systems. Based in Queensland, Australia. Supplies to clients worldwide.
http://www.edmi.com.au