ICF International is on Team Awarded
U.S. Internal Revenue Service Subcontract

Program Management and Training to Support
Organizational Transformation

FAIRFAX, VA, October 3, 2006 – ICF International announced today that it is part of the team led by Colleague Consulting, which was awarded a five-year Indefinite Delivery Indefinite Quantity (IDIQ) subcontract worth up to $US11 million with the U.S. Internal Revenue Service (IRS). The contractor team will work with the IRS to create a high-performance organization by assisting the department in identifying and addressing key organizational development issues, including workforce change management, transition assistance, strategic and operational planning assistance, conflict management assistance, and leadership coaching assistance.

"We look forward to supporting the performance of the IRS through improvements in strategy, change management, department coordination and communication, and departmental design," says Michael Cook of prime contractor, Colleague Consulting. "ICF’s training and professional development skills complement those of Colleague Consulting, ensuring that the team can effectively manage and advance the IRS’s organizational effectiveness."

"ICF’s seasoned professionals will help ensure that IRS leaders and employees are aligned with the agency’s goals and organizational objectives to help improve performance and overall customer and taxpayer satisfaction," says Peter Bonner, senior vice president and expert in human capital strategies at ICF.

This contract reflects the expanding government-wide emphasis on increased accountability and organizational effectiveness. The program management experts will work with the IRS to address agency impediments, including the impact of workforce transitions caused by mergers and restructuring, conflict, and cultural issues. The team will identify effective agency communication tactics to reduce the distance between decision-makers and customers.

Colleague Consulting LLC, founded in 1997, provides organizational development and human resources management consulting, project management consulting, and technical and management training services to public and private sector organizations. Based in the greater Washington, D.C., area, we draw on the expertise of our staff, our professional consultants, and the resources of a great region to promote the productivity and success of our clients.

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.

For Immediate Release Contact: Douglas Beck 1.703.934.3820

This press release may contain forward-looking statements that reflect our current expectations regarding the U.S. Internal Revenue Service (IRS) subcontract, our role in the team awarded the subcontract, and the outcome of the services rendered to the IRS. Words such as "will", "plans," and similar words or phrasing identify forward-looking statements. These statements are not guarantees and involve risks and uncertainties that could cause actual results to differ materially from those anticipated in the forward-looking statements. These risks and uncertainties include, but are not limited to, the fact that funding under the Indefinite Delivery Indefinite Quantity (IDIQ) subcontract is not guaranteed, risks related to the actual performance of members of the team, risks associated with the satisfaction by the IRS or the primary contractor of their respective requirements under the contract, and the risk that the IRS or the primary contractor requests no services or substantially less in services than allowed by the subcontract. For other factors that could cause ICF International's results to vary from expectations, please see the risks detailed from time to time in our filings with the Securities and Exchange Commission, including our Registration Statement on Form S-1 under the caption "Risk Factors."