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CACI Awarded $49 Million Contract With Defense Advanced Research Projects Agency

Recompete Win Continues CACI Program Management and Technical Support

Arlington, VA, April 24, 2006 - CACI International Inc (NYSE: CAI) announced today it has been awarded funding to continue providing acquisition, financial, programmatic and scientific technical assistance to the Defense Advanced Research Projects Agency (DARPA) Information Processing Technology Office (IPTO) in Arlington, Virginia. The award, with one base year and three option periods, and worth up to $49 million, was made under the U.S. Navy's SeaPort Enhanced (SeaPort-e) contract vehicle. With the award, CACI continues to expand its acquisition and program management support business with DARPA and the Department of Defense.

The mission of IPTO is to develop the next generation of computational and information processing systems and technologies. These cutting-edge systems and technologies will provide DoD with the highly advanced information processing capabilities necessary for military information dominance.

CACI's expertise in program, financial, and acquisition management, along with its scientific technical assistance capability, has enhanced the ability of DARPA scientists and researchers to focus on their primary mission of identifying, assessing, and advancing new technology research and development. CACI's experienced team will continue to provide a broad range of support capabilities to include assistance on individual financial and program requirements, ensuring that projects are completed effectively, efficiently, and on time. CACI will also help manage conferences and industry seminars that DARPA sponsors, which are used to explore and identify new technologies.

According to Paul Cofoni, CACI's President of U.S. Operations, "This recompete win reflects the sustained excellence CACI has provided to the Defense Advanced Research Projects Agency. With dedication, expertise, and a comprehensive understanding of customer needs, CACI has seamlessly integrated its support role into the agency's daily operations while also satisfying and rapidly responding to evolving DARPA needs."

CACI's Chairman and CEO, Dr. J.P. (Jack) London, said, "CACI's dedication to quality client service is one of the pillars of our corporate culture, and one of the reasons why we are very successful at winning recompete business with clients like the Defense Advanced Research Projects Agency. We are proud to partner with DARPA to support the development of critical new information processing technologies. The advances resulting from DARPA's research are critical to our nation's ability to succeed in the war against terrorism and to provide the best possible support to our warfighters around the world."

CACI International Inc provides the IT and network solutions needed to prevail in today's new era of defense, intelligence, and e-government. From systems integration and managed network solutions to knowledge management, engineering, simulation, and information assurance, we deliver the IT applications and infrastructures our federal customers use to improve communications and collaboration, secure the integrity of information systems and networks, enhance data collection and analysis, and increase efficiency and mission effectiveness. Our solutions lead the transformation of defense and intelligence, assure homeland security, enhance decision-making, and help government to work smarter, faster, and more responsively. CACI has been named to the Fortune 1000 Largest Companies of 2006. A member of the Russell 1000 index, CACI provides dynamic careers for approximately 10,100 employees working in over 130 offices in the U.S. and Europe. CACI is the IT provider for a networked world. Visit CACI on the web at www.caci.com.

There are statements made herein which do not address historical facts and, therefore could be interpreted to be forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Such statements are subject to factors that could cause actual results to differ materially from anticipated results. The factors that could cause actual results to differ materially from those anticipated include, but are not limited to, the following: regional and national economic conditions in the United States and the United Kingdom, including conditions that result from terrorist activities or war; failure to achieve contract awards in connection with recompetes for present business and/or competition for new business; the risks and uncertainties associated with client interest in and purchases of new products and/or services; continued funding of U.S. government or other public sector projects in the event of a priority need for funds, such as homeland security, the war on terrorism or rebuilding Iraq; government contract procurement (such as bid protest, small business set asides, etc.) and termination risks; the results of government investigations into allegations of improper actions related to the provision of services in support of U.S. military operations in Iraq; individual business decisions of our clients; paradigm shifts in technology; competitive factors such as pricing pressures and/or competition to hire and retain employees (particularly those with security clearances); material changes in laws or regulations applicable to our businesses, particularly in connection with (i) government contracts for services, (ii) outsourcing of activities that have been performed by the government, and (iii) competition for task orders under Government Wide Acquisition Contracts ("GWACs") and/or schedule contracts with the General Services Administration; our own ability to achieve the objectives of near term or long range business plans; changes that could result from accounting adjustments requested in connection with finalizing our Report on Form 10-K; and other risks described in the company's Securities and Exchange Commission filings.

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For investor information contact:

David Dragics
Vice President, Investor Relations
(703) 841-7835
ddragics@caci.com

For other information contact:

Jody Brown
Executive Vice President, Public Relations
(703) 841-7801
jbrown@caci.com



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