ICF International Acquires Advanced Performance Consulting Group.

Acquisition Enhances Strategic Consulting Services

FAIRFAX, Va. -- ICF International (Nasdaq:ICFI) announced today that it has acquired Advanced Performance Consulting Group (APCG), a 29-person Washington, D.C., consulting firm that specializes in helping federal organizations develop and implement strategy, improve enterprise performance, manage change, support employee growth, and communicate effectively.

"APCG and ICF share a common vision and are market leaders known for their dedication to quality and commitment to integrity," said Sudhakar Kesavan, chief executive officer at ICF. "Across a broad array of federal and other government clients, ICF can provide scale and complementary expertise to APCG's strategic consulting services, while APCG can provide ICF with an expanded set of clients and experience in strategic organization and performance measurement."

A small, woman-owned management consulting firm founded in 1998, APCG has earned an excellent reputation for helping federal agencies improve business performance during a time of increasing budget pressures, regulatory compliance, and technology-driven change. Since its inception, APCG has achieved extraordinary levels of customer satisfaction. Recognition includes two consecutive years on Washington Technology's "Fast 50" list of outstanding small companies -- with a rise to No. 19 in 2005 -- and receipt of the 2003 Women in Technology (WIT) Entrepreneur Leadership Award for outstanding accomplishments in mentoring and entrepreneurship.

"APCG enjoys a reputation as a strategic advisor to senior-level federal clients. The firm works to ensure that decisions look beyond short-term fixes to focus on long-term strategic solutions that will make a tangible impact within the organization. Our services complement ICF's strengths in providing federal and other government clients with end-to-end solutions to their most challenging issues," said Kimberly (Kymm) McCabe, president and chief executive officer of APCG.

"With corresponding client coverage, APCG and ICF see a good strategic fit and believe that there are growth opportunities in many areas for both firms," said Ngozi Irondi, co-CEO and vice president of APCG. "APCG's work will enhance ICF's capabilities in human capital and strategic communications consulting."

Kymm McCabe and Ngozi Irondi will continue to manage the APCG business within ICF.

ICF International (Nasdaq:ICFI) partners with government and commercial clients to deliver consulting services and technology solutions in the energy, environment, transportation, social programs, defense, and homeland security markets. The firm combines passion for its work with industry expertise and innovative analytics to produce compelling results throughout the entire program life cycle, from analysis and design through implementation and improvement. Since 1969, ICF has been serving government at all levels, major corporations, and multilateral institutions. More than 1,800 employees serve these clients worldwide. ICF's Web site is http://www.icfi.com.

This document may contain "forward-looking statements"--that is, statements related to future--not past--events, plans, and prospects. In this context, forward-looking statements may address matters such as our expected future business and financial performance, and often contain words such as "guidance," "expects," "anticipates," "intends," "plans," "believes," "seeks," "should," or "will." Forward-looking statements by their nature address matters that are, to different degrees, uncertain. For ICF, particular uncertainties that could adversely or positively affect the Company's future results include: risks related to the government contracting industry, including possible changes in government spending priorities; risks related to the Company's business, including its dependence on contracts with U.S. Federal Government agencies and departments and continued good relations, and being successful in competitive bidding, with those customers; performance by ICF and its subcontractors under a major contract with the State of Louisiana, Office of Community Development; uncertainties as to whether revenues corresponding to the Company's contract backlog will actually be received; strategic actions, including the ability to make acquisitions and the performance and future integration of acquired businesses; risk associated with operations outside the United States; and other risks and uncertainties disclosed in the Company's filings with the Securities and Exchange Commission. These uncertainties may cause ICF's actual future results to be materially different than those expressed in the Company's forward-looking statements. ICF does not undertake to update its forward-looking statements.