UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of
the Securities Exchange Act of 1934 (Amendment No. 1)

Filed by the Registrant  x
Filed by a Party other than the Registrant  o
Check the appropriate box:
o	Preliminary Proxy Statement
o	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
x	Definitive Proxy Statement
o	Definitive Additional Materials
o	Soliciting Material under §240.14a-12
CRA INTERNATIONAL, INC.
(Name of Registrant as Specified In Its Charter)
(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check the appropriate box):
x	No fee required.
o	Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
	(1)		Title of each class of securities to which transaction applies:
	(2)		Aggregate number of securities to which transaction applies:
	(3)		Per unit price or other underlying value of transaction computed pursuant to Exchange Act Rule 0-11 (set forth the amount on which the filing fee is calculated and state how it was determined):
	(4)		Proposed maximum aggregate value of transaction:
	(5)		Total fee paid:
o	Fee paid previously with preliminary materials.
o	Check box if any part of the fee is offset as provided by Exchange Act Rule 0-11(a)(2) and identify the filing for which the offsetting fee was paid previously. Identify the previous filing by registration statement number, or the Form or Schedule and the date of its filing.
	(1)	Amount Previously Paid:
	(2)	Form, Schedule or Registration Statement No.:
	(3)	Filing Party:
	(4)	Date Filed:

EXPLANATORY NOTE

This Amendment No. 1 to the definitive Proxy Statement and notice of internet availability of proxy materials on Schedule 14A filed by CRA International, Inc. with the U.S. Securities and Exchange Commission on April 24, 2020 amends the Proxy Statement and notice of internet availability of proxy materials solely to correct the deadline for electronic voting.  The revised proxy card and notice of internet availability of proxy materials provide that votes submitted electronically must be received by July 8, 2020 at 1:00 A.M. local time. Please note that no changes were made to the body of the definitive Proxy Statement.

MMMMMMMMMMMM MMMMMMMMMMMMMMM C123456789 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000004 ENDORSEMENT_LINE______________ SACKPACK_____________ Your vote matters – here’s how to vote! You may vote online instead of mailing this card. Votes submitted electronically must be MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 ADD 6 received by July 8, 2020 at 1:00 A.M., local time. Online GIof ntoo welwewct.reonnviicsivoontrienpgo, rts.com/CRAI or delete QR code and control # scan the QR code — login details are located in the shaded bar below. Save paper, time and money! Sign up for electronic delivery at www.envisionreports.com/CRAI Using a black ink pen, mark your votes with an X as shown in this example. Please do not write outside the designated areas. q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q + 1. To consider and vote upon the Election of three Class I Directors: For Withhold For Withhold For Withhold 01 - Richard D. Booth 02 - William F. Concannon 03 - Christine R. Detrick For Against Abstain ForAgainst Abstain 2. To approve, on an advisory basis, the compensation paid to CRA’s named executive officers, as disclosed in the proxy statement for the 2020 meeting of its shareholders. 3. To ratify the appointment by our audit committee of Grant Thornton LLP as our independent registered public accountants for our fiscal year ending January 2, 2021. Please sign exactly as name(s) appears hereon. Joint owners should each sign. When signing as attorney, executor, administrator, corporate officer, trustee, guardian, or custodian, please give full title. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. MMMMMMM C 1234567890 J N T 6 1 5 1 2 MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE 140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND + 3 2 C V 4 0399SD MMMMMMMMM B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below. A Proposals — The Board of Directors recommends a vote FOR the listed nominees as Class I Directors and FOR Proposals 2 and 3. Annual Meeting Proxy Card1234 5678 9012 345

The 2020 Annual Meeting of Shareholders of CRA International, Inc. will be held on July 8, 2020 at 8:00 a.m. local time, virtually via the internet at www.meetingcenter.io/272433575. To access the virtual meeting, you must have the information that is printed in the shaded bar located on the reverse side of this form. The password for this meeting is — CRAI2020. q IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE. q + THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF CRA INTERNATIONAL, INC. THE BOARD OF DIRECTORS RECOMMENDS A VOTE FOR EACH NOMINEE LISTED IN PROPOSAL 1 AND FOR PROPOSALS 2 AND 3. CRA International, Inc.’s Annual Meeting of Shareholders will be held on July 8, 2020 at 8:00 a.m. local time as a “hybrid” meeting, with a physical location at 200 Clarendon Street, 9th Floor, Boston, Massachusetts, and a simultaneous virtual meeting, which will be held via live webcast at www.meetingcenter.io/272433575, where you will be able to listen to the meeting live, submit questions and vote. The meeting password is CRAI2020. Proxy for Annual Meeting of Shareholders to be held on July 8, 2020 The undersigned shareholder of CRA International, Inc. (“CRA”), revoking all prior proxies, hereby appoints Paul Maleh and Jonathan Yellin, and each acting singly, proxies, with full power of substitution, to vote all shares of capital stock of CRA that the undersigned is entitled to vote at the Annual Meeting of Shareholders of CRA to be held on Wednesday, July 8, 2020, beginning at 8:00 a.m., local time, and at any adjournments or postponements thereof, upon the matters set forth in the Notice of Annual Meeting dated April 24, 2020, and the related Proxy Statement, copies of which have been received by the undersigned, and in their discretion upon any business that may properly come before the meeting or any adjournment or postponement thereof. Attendance of the undersigned at the Annual Meeting or any adjournment or postponement thereof will not be deemed to revoke this proxy unless the undersigned shall affirmatively indicate the intention of the undersigned to vote the shares represented hereby in person prior to the exercise of this proxy. THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED AS DIRECTED. IF NO DIRECTION IS GIVEN WITH RESPECT TO A PROPOSAL, THE SHARES REPRESENTED BY THIS PROXY WILL BE VOTED FOR EACH NOMINEE LISTED IN PROPOSAL 1 AND FOR PROPOSALS 2 AND 3, OR OTHERWISE IN ACCORDANCE WITH THE RECOMMENDATION OF THE BOARD OF DIRECTORS. Please promptly date and sign this proxy and mail it in the enclosed envelope to ensure representation of your shares. No postage need be affixed if mailed in the United States. Change of Address — Please print new address below. Meeting Attendance Mark box to the right if you plan to attend the Annual Meeting. + C Non-Voting Items Proxy - CRA International, Inc. Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/CRAI