ICF International Completes Acquisition of Simat, Helliesen & Eichner, Inc., One of the World's Largest Air Transport Consultancies

Fairfax, VA, December 3, 2007 - ICF International (NASDAQ: ICFI), a leading policy, management, and technology consulting firm, today announced it has acquired Simat, Helliesen & Eichner, Inc. (SH&E), one of the world’s largest air transport consultancies. The purchase price was approximately US$51 million.

As previously announced on November 12, ICF expects SH&E to generate revenue of approximately $36 million and EBITDA margins of approximately 15 percent for the year ending December 31, 2007. Going forward, ICF anticipates annual revenue growth of at least 10 percent and similar EBITDA margins. The present management team and employees will remain with the company.

“By combining our companies, ICF and SH&E have become a preeminent consultancy in providing unparalleled capabilities and resources on transportation, infrastructure, and climate change issues,” said Sudhakar Kesavan, chief executive officer of ICF. “ICF and SH&E have a common customer-first approach to business, an unwavering commitment to quality, and a strong dedication to solving the most challenging public policy issues. Our combined strength will result in enriched service offerings and a stronger resource base for our clients than either company could have provided on its own.”

Combining SH&E’s 40 years of expertise in the aviation industry with ICF’s industry-wide leadership in climate change strategies, including addressing and mitigating greenhouse gas emissions (GHG) from airport expansion projects, the companies are poised to capture this high-growth market.

“SH&E is very pleased to be a part of ICF as we lead the way in the air transport and climate change markets, both of which show significant growth worldwide,” said David Treitel, president of SH&E. “It’s an honor to join this team of prestigious professionals, and we look forward to growing the company’s transportation business.” Mr. Treitel also will serve as a senior vice president with ICF.