| Advanced_Energy_Systems Provides design and procurement for energy conservation, alternative energy and distributed generation needs. Residential and commercial energy audits. |
| AEA_Technology_Environment An environmental and energy consultancy services company. |
| Aegent_Energy_Advisors_Inc_ Provide objective advice and analysis to assist large energy users to reduce the cost, manage the risk, and resolve the complexity of their natural gas and electricity purchasing. |
| AeroMet_Engineering,_Inc_ Environmental consulting and testing. Offers smoke school certification, contacts and mission statement. |
| Aina_Environmental_Group,_Inc_ Hawaiian environmental consultants. |
| Air_Pollution_Testing,_Inc__ Smoke stack testing, emissions monitoring, and power plant pollution testing. |
| Air_Technology_Ltd Independent measurement based consultancy specialising in compressed air, water, vacuum and other pressure systems. Problem solving and energy savings. |
| Altran_Corporation Engineering, materials and management solutions for utilities and industry. Specializing in Flow Accelerated Corrosion (FAC), biofouling detection, boiler engineering and technical training services. |
| A&M_Insulations_Ltd_ UK-based thermal insulation engineers, specialists in cavity wall and loft insulation, fire protection, and cavity wall tie replacement. |
| Ameresco Provide demand-side management, cogeneration facilities, renewable sources, procurement, and power plant development. Customers served, solutions, and results. |
| Ammonite_Resources_Company North American and international petroleum consultants specializing in geology, geophysics, engineering,technical and business due diligence, economic analyses, contract negotiations, expert witness t |
| Analytical_Services,_Inc_ Environmental and energy consulting. Environmental, safety, health, and energy-related services. |
| Antares_Group_Inc Consulting engineers and economists expert in energy technologies for power, transportation and industrial sectors, including renewable energy, alternative fuels and vehicles, green buildings, and Fed |
| APEM_Ltd Aquatic sciences environmental consultancy providing an integrated approach to the investigation and management of both freshwater and marine habitats. |
| Apex_Technological_Field__Services_LTD_ Sampling, trouble shooting, and consulting in the oil and gas industry. Onsite analysis for H2S, water dewpoints, O2, corrosion, and volume measured millipore samples. |
| Aptech_Engineering_Services,_Inc_ An independent engineering services firm dedicated to finding timely and cost-effective solutions to power plant problems. |
| AquaMatrix Water resource, hydropower, hydro-electric and environment consultancy that has completed projects in Africa, Asia, Australia, Europe and the Americas. |
| Arbutus Renewable energy project consultants. Specialists in landfill methane. Operations in UK, Spain, Mexico, and Costa Rica. |
| Architectural_Energy_Corporation Improving building energy performance via: energy engineering, sustainable design assistance and LEED consulting, building commissioning, monitoring and verification, commercial kitchen ventilation te |
| ASC_International_BV Project management organisation providing specialised manpower to the upstream Oil,Gas,Petrochemical, and Power industries. |
| Asia_Consult_Ltd Asia-based consulting for the downstream oil and chemicals industry. |
| Atlantic_Environmental_Solutions,_Inc_ New Jersey based environmental consulting firm specializing in due diligence, soil and groundwater remediation,asbestos surveys and brownfields redevelopment. |
| Audits_Unlimited Consultants who specialise in utilities, providing news and a directory of companies offering complementary services. |
| Aurora_Environmental Scottish company providing independent environmental survey and consultancy services to government and industry worldwide. |
| Australian_Power_and_Water_Pty_Ltd Consulting and project management in power, water and environmental sectors for all phases of projects including: master plans; project identification; feasibility studies; design; construction; contr |
| Awaken_EPI Shropshire UK based environmental consultants, specialising in SHE safety, health and environmental performance improvement, designed to improve efficiency with energy useage and worker productivity. |
| Axford_Turbine_Consultants Consulting assistance for companies in the turbine power generation industry. |
| AXYS_Environmental_Consulting_Ltd_ A Canadian-based multi-disciplinary consulting firm achieving practical, balanced solutions through a diverse professional and technical staff and a comprehensive scientific approach. |
| Balfours_Environmental Asbestos assessment consulting services. |
| Ballonoff_Consulting_Service Consulting in strategic planning, energy law, energy economics, and international development. |
| The_Barlow_Group,_Inc_ Engineering and consulting services for the Power Generation Industry. |
| BB&E,_LLC Michigan based environmental consultants. |
| BCS_Inc_ Established management consulting firm in Columbia, MD specializing in domestic and international energy market research, industry analysis, database development, program evaluation and strategic plan |
| Bevilacqua-Knight,_Inc_ Technical consulting firm for the energy and transportation industries specializing in bringing new technologies from lab to market. |
| BioMaxx_Systems_Inc_ Promoting clean, efficient and safe energy alternatives, reducing emissions,and controling green house gas emissions for the Global alternative fuel markets. |
| BioTherm_Energy Investment in and development of energy projects in Southern Africa. |
| Blue_Heron_Solutions Environmental consulting for resource based companies. ISO 14001 audits, compliance audits, compliance plans, training, permitting assistance for mining, pulp and paper in Northern Ontario |
| Bolton_Photoscience Consulting services dealing with water, waste-water, and air treatment via ultraviolet (UV) technologies. |
| Boston_Environmental_and_Engineering_Associates Environmental site assessments and structural engineering services for residential and commercial properties. |
| Brais,_Malouin_&_Associates Energy engineering consulting firm specialized in combustion and numerical simulation. (English and French). |