• A.T. Massey

• ABB (Equipment Units in Germany and Switzerland)

• ABB Energy Ventures

• ABN Amro (UK)

• AES

• Andalex Resources

• Ansaldo (Italy)

• Arch Coal Inc.

• ARCO

• Atel

• Baker Hughes

• Billiton (Netherlands)

• BP Coal

• Cambridge Energy Research Associates

• Central Electric Generating Board (UK)

• CEZ (Czech Republic)

• Charles River Associates

• Citrus Trading Corporation

• CMS Gas

• CMS Generation

• Coastal Corp.

• COMEnergy

• CRA (Australia)

• Cypress Power Partners

• Cyprus Minerals

• Dept. of Treasure, Republic of South Africa

• DG for Energy and Transportation (European Commission)

• Dun & Bradstreet

• EDF Hungaria Kft.

• Electric Power Research Institute

• Electricite de France

• El Paso Energy

• Empresa Municipal de Cali (Colombia)

• ENDESA (Spain)

• Occidental Petroleum of China (China)

• Pöyry Energy AG

• Portland General Electric Company

• PowerGen (UK)

• PreussenElektra (Germany)

• PT Berau (Indonesia)

• Republic of South Africa, Treasury Department

• Rheinbraun AG (RWE; Germany)

• RWE Entsorgung AG (Germany)

• Saale Energie GmbH Services (Germany)

• Saar Energie AG

• Siemens Power Systems (Germany)

• STEAG AG

• Stewart McKelvey (Canada)

• Stredoslvenska Energetika (Slovakia)

• Treuhandanstalt (Germany)

• VEAG (Vattenfall Europe; Germany)

• Vattenfall (Sweden)

• Verbundnetz Gas AG (German)

• Vereinigte Elektrizitätswerke Westfalen (Germany)

• Westinghouse

• World Bank

• Zeigler Coal

• EnD~I AG (Germany)

• ENEL (Italy)

• Energieversorgung Halle GmbH (Germany)

• Engineered Fuels LC

• Enron Gas

• Enron Power

• Entrade AG (Switzerland)

• E.on Energie AG

• European Commission

• Florida Gas Transmission

• Florida Progress

• Goldman Sachs (Germany)

• Headwaters Energy Services

• Headwaters Technology Innovations

• Houston Industries

• Houston Natural Gas

• Indeck Energy

• Ingwe Coal (South Africa)

• International Finance Corp.

• IPCO (Singapore)

• Island Creek China (China)

• Island Creek Coal

• Lanka Coal Co. Ltd. (Sri Lanka)

• Leuna AG (Germany)

• Long Term Credit Bank of Japan (Japan)

• Loxley Infra Ltd. (Thailand)

• MIBRAG mbH (Germany)

• Mitsubishi Corporation (Japan)

• Mitteldeutsche Energieversorgung AG (Germany)

• National Power (UK)

• Nations Bank

• NERCO

• Nippon Kokan (Japan)

• North American Coal Corp.

• NRG Energy, Inc.

In addition:  government agencies in China and Pakistan, as well as various major international law firms, including Baker & McKenzie and Davis Polk & Wardwell.

ISIS was also on the Board of Directors of the Mississippi Valley Coal Exporters Council and was a member of Western Coal Council.  In addition,

has been a member of the U.S. delegation to the Economic Commission for Europe and serves on the boards of two German companies and is a member of the VIK’s CO₂ Committee.