UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 12, 2018

CACI International Inc

(Exact name of Registrant as Specified in Its Charter)

Registrant’s Telephone Number, Including Area Code: (703) 841-7800

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instructions A.2. below):

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On June 12, 2018, the Board of Directors (the “Board”) of CACI International Inc (the “Company”) elected Debora A. Plunkett to the Board effective July 1, 2018. Ms. Plunkett will initially serve on the Audit, Investor Relations and Strategic Assessment Committees of the Board. The Board has determined that Ms. Plunkett is an “independent director” in accordance with the New York Stock Exchange listing standards, the rules and regulations of the Securities and Exchange Commission and the Company’s corporate governance guidelines.

The election of Ms. Plunkett was not pursuant to any arrangement or understanding between Ms. Plunkett and any other person. As of the date of this report, neither Ms. Plunkett, nor any of her immediate family members, is a party, either directly or indirectly, to any transaction that would be required to be reported pursuant to Item 404(a) of Regulation S-K.

There was no plan, contract or arrangement that was entered into or materially modified in connection with Ms. Plunkett’s election and Ms. Plunkett will be compensated consistent with the Company’s compensation programs for non-employee directors.

A copy of the Company’s press release regarding Ms. Plunkett’s election is filed as Exhibit 99.1 to this Form 8-K and incorporated herein by reference.

Item 9.01 Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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