CACI International to Release FY19 Annual Guidance After Market Close on June 20, 2018

To Hold Webcast Before Market Open on June 21, 2018

CACI International Inc (NYSE: CACI) will issue its Fiscal Year 2019 (FY19) Annual Guidance at 4:15 pm Eastern Time on Wednesday, June 20, 2018. Following the release of this information, we have scheduled a webcast for Thursday, June 21, 2018 at 8:30 am Eastern Time. Members of our senior management team will be making a brief presentation, followed by a question-and-answer session to discuss the guidance and management’s performance expectations for the new fiscal year.

You can listen to the webcast and view the accompanying exhibits over the Internet by logging on to http://investor.caci.com/news/#upcomingevent at the scheduled time. A replay of the call will also be available over the Internet and can be accessed through our homepage (www.caci.com) by clicking on the CACI Investor Relations tab.

CACI provides information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. A Fortune World’s Most Admired Company, CACI is a member of the Fortune 1000 Largest Companies, the Russell 2000 Index, and the S&P SmallCap600 Index. CACI’s sustained commitment to ethics and integrity defines its corporate culture and drives its success. With approximately 18,600 employees worldwide, CACI provides dynamic career opportunities for military veterans and industry professionals to support the nation’s most critical missions. Join us! www.caci.com.

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CACI International IncCorporate Communications and Media:Jody Brown, Executive Vice President, Public [e-mail] Relations:David Dragics, Senior Vice President, Investor [e-mail]