News Release
CACI International Inc 1100 North Glebe Road Arlington Virginia 22201
www.caci.com

CACI Awarded Prime Contract on $16.4 Billion, Multiple-Award U.S. Army Rapid Response Program

New Work for CACI on Government-Wide Program

Arlington, VA, August 30, 2010 - CACI International Inc (NYSE:CACI) announced today that it has been awarded one of 17 prime contracts to support the U.S. Army Communications and Electronics Command (CECOM) Rapid Response - Third Generation (R2-3G) program. The five-year, indefinite delivery/indefinite quantity contract has a ceiling value of $16.4 billion. It is designed to provide all defense and federal civilian agencies with solutions for critical hardware, software, systems management, and rapid response requirements. While CACI provides significant support for the U.S. Army's Team C4ISR (command, control, communications, computers, intelligence, surveillance, and reconnaissance) warfighter capabilities, this award represents new business for CACI, complementing the company's very successful support for the Army's Strategic Services Sourcing (S3) and Technical Engineering Support Services (TESS) programs.

CACI's experience in supporting C4ISR systems throughout their lifecycle was instrumental in the government's selection of CACI to support the R2-3G program. Under this contract, CACI will deliver a wide range of C4ISR services and solutions. CACI's ability to quickly respond to new and emerging requirements with highly complex and cost-effective solutions assures clients of successful and on-time project delivery. CACI support includes technology insertion, system integration/installation, fabrication/prototyping, testing/certification, studies/analyses, logistics support, and training and engineering support, including re-engineering and reverse-engineering for a range of equipment and anti-terrorism technology.

Bill Fairl, CACI's President of U.S. Operations, said, "CACI has supported U.S. Army C4ISR and rapid response programs for the warfighter for many years, and we offer the benefit of lessons learned and best practices. Our Rapid Response - Third Generation team also includes small business and skilled providers who give us significant depth and breadth in the solutions we provide to help government respond quickly to urgent requirements."

According to CACI President and CEO Paul Cofoni, "CACI has strategically focused on building our rapid response capabilities to support growing government requirements. We provide long-term value, innovation, and an in-depth understanding of the federal environment. We believe this combination of technical expertise and service excellence makes CACI a valuable government partner, especially on complex and multifaceted programs. This award is further confirmation of CACI's ability to win the major contracts from our key clients that will support our growth strategy and continue to enhance shareholder value."

CACI provides professional services and IT solutions needed to prevail in the defense, intelligence, homeland security, and federal civilian government arenas. We deliver enterprise IT and network services; data, information, and knowledge management services; business system solutions; logistics and material readiness; C4ISR Solutions; cyber solutions; integrated security and intelligence solutions; and program management and SETA support services. CACI services and solutions help our federal clients provide for national security, improve communications and collaboration, secure the integrity of information systems and networks, enhance data collection and analysis, and increase efficiency and mission effectiveness. CACI is a member of the Fortune 1000 Largest Companies and the Russell 2000 index. CACI provides dynamic careers for approximately 13,200 employees working in over 120 offices in the U.S. and Europe. Visit CACI on the web at www.caci.com and www.asymmetricthreat.net.

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 a prolonged recession; terrorist activities or war; changes in interest rates; currency fluctuations; significant fluctuations in the equity markets; 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, based on a change in spending patterns, or in the event of a priority need for funds, such as homeland security, the war on terrorism or rebuilding Iraq; or an economic stimulus package; government contract procurement (such as bid protest, small business set asides, loss of work due to organizational conflicts of interest, 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; the results of government audit and reviews conducted by the Defense Contract Audit Agency or other government entities with cognizant oversight; 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); market speculation regarding our continued independence; 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, (iii) competition for task orders under Government Wide Acquisition Contracts ("GWACs") and/or schedule contracts with the General Services Administration; and (iv) accounting for convertible debt instruments; our own ability to achieve the objectives of near term or long range business plans; and other risks described in the company's Securities and Exchange Commission filings.

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Corporate Communications and Media:

Jody Brown, Executive Vice President, Public Relations

(703) 841-7801, jbrown@caci.com

Investor Relations:

David Dragics, Senior Vice President, Investor Relations

(866) 606-3471, ddragics@caci.com