Press Release

ICF Again Recognized as Industry Leader

FAIRFAX, Va.--(BUSINESS WIRE)--Jan. 3, 2012-- For the sixth straight year, ICF International (NASDAQ:ICFI) has been honored by companies participating in the Environmental Finance and Carbon Finance survey for its outstanding work in carbon strategy, renewable energy, and greenhouse gas mitigation. With more than 1,000 companies casting votes in the survey, ICF was recognized as Best Advisory/Consultancy in five of the survey's advisory categories:

• Best Advisory/Consultancy European Union Emissions Trading System
• Best Advisory/Consultancy Kyoto Project Credits (Joint Implementation and Clean Development Mechanism)
• Best Advisory/Consultancy North American Markets (ALL)
• Best Advisory/Consultancy SO2 & NOx Markets (ALL)
• Best Advisory/Consultancy Renewable Energy Finance North America

ICF was recognized by Environmental Finance and Carbon Finance in the most closely watched survey of sentiment across carbon, renewable energy, weather risk, and U.S. emissions markets. The survey reveals those firms that their clients, peers, and competitors have judged to have provided the best service over the previous twelve months. The results of the survey appear in the December-January Environmental Finance - 2012 Environmental Market Outlook issue.

For the 12^th annual awards competition, companies nominated leading brokers, dealers, and advisors in several categories. Companies are allowed only one vote, cannot vote for themselves, and can vote only in categories in which they had direct experience. Selection criteria include efficiency and speed of transaction, reliability, innovation, quality of information and service provided, and influence on the market.

"For the sixth straight year, ICF International has been recognized by companies participating in the Environmental Finance and Carbon Finance survey for its leadership of energy and climate change issues. I am enormously proud of this honor, which reflects the hard work and dedication of more than 400 ICF energy and climate change specialists working worldwide who provide innovative solutions to complex energy and climate challenges facing our world today," said ICF International Chairman and CEO Sudhakar Kesavan.

Environmental Finance is the leading international publication covering the ever-increasing impact of environmental issues on the lending, insurance, investment, and trading decisions affecting industry.

For more information:

• ICF Energy: http://www.icfi.com/energy
• ICF Climate Overview: http://www.icfi.com/climate
• ICF Greenhouse Gas Mitigation: http://www.icfi.com/markets/climate/greenhouse-gas-mitigation-compliance-support-and-environmental-strategy
• ICF Sustainability: http://www.icfi.com/markets/climate/sustainability

About ICF International

ICF International (NASDAQ:ICFI) partners with government and commercial clients to deliver professional services and technology solutions in the energy and climate change; environment and infrastructure; health, human services, and social programs; and homeland security and defense markets. The firm combines passion for its work with industry expertise and innovative analytics to produce compelling results throughout the entire program lifecycle, from research and analysis through implementation and improvement. Since 1969, ICF has been serving government at all levels, major corporations, and multilateral institutions. More than 4,000 employees serve these clients worldwide. ICF's website is http://www.icfi.com.

Caution Concerning Forward-looking Statements

Statements that are not historical facts and involve known and unknown risks and uncertainties are "forward-looking statements" as defined in the Private Securities Litigation Reform Act of 1995. Such statements may concern our current expectations about our future results, plans, operations and prospects and involve certain risks, including those related to the government contracting industry generally; our particular business, including our dependence on contracts with U.S. federal government agencies; and our ability to acquire and successfully integrate businesses. These and other factors that could cause our actual results to differ from those indicated in forward-looking statements are included in the "Risk Factors" section of our securities filings with the Securities and Exchange Commission. The forward-looking statements included herein are only made as of the date hereof, and we specifically disclaim any obligation to update these statements in the future.

Source: ICF International

ICF International
Steve Anderson, +1-703-934-3847
steve.anderson@icfi.com