News Release CACI International Inc · 1100 North Glebe Road · Arlington Virginia 22201

CACI Reports Record Results for Its Fiscal 2010 Third Quarter

Diluted earnings per share increased 20.6 percent to $0.87
Revenue increased 16.3 percent to $784 million, driven by 14.2 percent organic growth
Contract funding orders increased 19.2 percent to $886 million

Arlington, VA, April 28, 2010 - CACI International Inc (NYSE:CACI), a leading professional services and information technology solutions provider to the federal government, announced results today for its third fiscal quarter ended March 31, 2010.

We are pleased to report record third quarter net income of $26.7 million, or $0.87 diluted earnings per share. This net income was a 21.6 percent increase over net income of $22.0 million, or $0.72 diluted earnings per share, for the same period last year. The 16.3 percent increase in revenue in the quarter was driven by organic growth of 14.2 percent, reflecting the continued strong performance of our defense and intelligence businesses.

Commenting on the company's financial results, Paul Cofoni, CACI's President and CEO, said, "Our results this quarter continue to reflect the strength of our strategy to provide mission-critical services in support of well-funded national security priorities. We exceeded our financial goals of mid- to high-single-digit organic revenue growth and double-digit earnings growth. We continued to experience growth in all of our core competencies, with another particularly strong quarter from C4ISR Solutions. Funding orders maintained their strong pace, and we successfully defended all of our major recompeted contracts. We continued to generate strong cash flows, and we completed the important previously announced acquisition of SystemWare, Inc. that enhances our solutions in counterintelligence and cybersecurity. We are very pleased to deliver another quarter of record results to our shareholders."

Third Quarter Results

Net income and diluted earnings per share grew as a result of higher operating income, reduced net interest expense and a lower corporate tax rate due primarily to the performance of investments in CACI's deferred compensation plan and tax benefits related to software development.

Additional Financial Metrics

Third Quarter Contract Funding Orders and Awards

• Contract funding orders were $886 million, a 19.2 percent increase over the third quarter of FY09. Funded backlog was $1.9 billion, a 17.0 percent increase over the third quarter of FY09. Total backlog was $7.3 billion.
• We won a prime position on a new multiple-award, five-year indefinite delivery, indefinite quantity task order with a ceiling of $588 million to support the U.S. Navy's Space and Naval Warfare Systems (SPAWAR) Command's command and control operations.
• We also won additional contract awards with an estimated value of $455 million, including:
  • A $219 million award from the U.S. Navy to provide C4ISR and business software and maintenance services to the SPAWAR Systems Center Atlantic for up to five years.
  • Approximately $65 million in previously unannounced awards from the Intelligence Community.

Third Quarter Acquisition and Recognition

• We completed the acquisition of SystemWare, Inc., a $16 million designer, manufacturer, and provider of signals acquisition and analysis systems that enable users to monitor and detect cybersecurity vulnerabilities.
• CACI's U.S. operations achieved an enterprise-wide Capability Maturity Model Integration (CMMI^®) Maturity Level 3 rating, recognizing our delivery of software engineering and systems integration capabilities to our customers.

CEO Commentary

Mr. Cofoni commented, "Looking ahead to 2011, we are confident in our ability to continue to deliver double-digit earnings growth and mid- to high-single-digit organic revenue growth by successfully executing our strategy of providing mission-critical services to support national security priorities in well-funded areas. The administration has proposed a four percent increase in the 2011 Department of Defense baseline budget, with an eight and one half percent increase in the Operations and Maintenance accounts where we derive the majority of our funding. Our pipeline is robust and includes especially attractive bid opportunities in the areas of cybersecurity and national intelligence. We are accelerating our M&A program to capitalize on the increasing number of reasonably valued attractive candidates that fit our growth strategy, and the availability of capital at reasonable interest rates. We believe we remain well-positioned to grow and enhance shareholder value."

Nine Month Results

Revenue in all of our core competencies grew with the strongest increase in C4ISR Solutions. Operating income increased in the first nine months as a result of solid growth in both direct labor and other direct costs. Net income increased as a result of higher operating income and lower interest expense and income taxes.

Additional Financial Metrics

CACI Updates Its FY10 Guidance

We are updating our FY10 guidance. The table below summarizes the guidance ranges for FY10:

This guidance represents our views as of April 28, 2010. Investors are reminded that actual results may differ from these estimates for the reasons described below and in our filings with the Securities and Exchange Commission.

Conference Call Information

We have scheduled a conference call for 8:30 AM Eastern Time Thursday, April 29, 2010 during which members of our senior management team will be making a brief presentation focusing on third quarter results and operating trends followed by a question-and-answer session. You can listen to the conference call and view the accompanying exhibits over the Internet by logging on to our homepage, www.caci.com, at the scheduled time, or you may dial 877-303-9143 and enter the confirmation code 61017336. A replay of the call will also be available over the Internet beginning at 1:00 PM Eastern Time Thursday, April 29, 2010 and can be accessed through our homepage (www.caci.com) by clicking on the CACI Investor Info button.

About CACI

CACI International Inc provides the professional services and IT solutions needed to prevail in today's 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 security; 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. We add value to our clients' operations, increase their skills and capabilities, and enhance their missions. CACI is a member of the Fortune 1000 Largest Companies and the Russell 2000 index. CACI provides dynamic careers for approximately 13,000 employees working in over 120 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 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; changes in our effective tax rate; finalization of accounting for business combinations, including valuation of intangibles and contingent consideration; 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 audits and reviews conducted by the Defense Contract Audit Agency or other government entities with cognizant oversight; the insourcing of contractor positions by the government; 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, and (iii) competition for task orders under Government Wide Acquisition Contracts ("GWACs") and/or schedule contracts with the General Services Administration; the ability to successfully integrate the operations of our recent acquisitions; 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.

(Financial Tables follow)

# # #