LIMITED POWER OF ATTORNEY

    The undersigned officer and/or director of Cushman & Wakefield plc (the
"Company") hereby constitutes and appoints each of Brett Soloway and Michelle
Hay, signing singly, the undersigned's true and lawful attorney-in-fact to:

    (1) execute for and on behalf of the undersigned, in the undersigned's
        capacity as an officer and/or director of the Company, any and all Forms
        3, 4 and 5 prepared for and on behalf of the undersigned pursuant to
        Section 16(a) of the Securities Exchange Act of 1934 and the rules
        promulgated thereunder (the "Exchange Act");

    (2) do and perform any and all acts for and on behalf of the undersigned
        which may be necessary or desirable to complete and execute any such
        Form 3, 4 or 5, to complete and execute any amendment or amendments
        thereto and to timely file such form with the United States Securities
        and Exchange Commission (the "SEC") and any stock exchange or similar
        authority; and

    (3) take any other action of any type whatsoever in connection with the
        foregoing which, in the opinion of such attorney-in-fact, may be of
        benefit to, in the best interest of or legally required by the
        undersigned, it being understood that the documents executed by such
        attorney-in-fact on behalf of the undersigned pursuant to this Limited
        Power of Attorney shall be in such form and shall contain such terms and
        conditions as such attorney-in-fact may approve in such attorney-in-
        fact's discretion.

    The undersigned hereby grants to each such attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in
serving in such capacity at the request of the undersigned, are not assuming,
nor is the Company assuming, any of the undersigned's responsibilities to comply
with Section 16 of the Exchange Act.

    This Limited Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 4 and 5 with respect to the
undersigned's holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing delivered to the
foregoing attorneys-in-fact.

    By signing below, the undersigned does hereby revoke any and all other power
of attorney documents previously and otherwise executed in connection with the
undersigned's obligations as an officer and/or director of the Company to
prepare and file Forms 3, 4 and 5, or other forms or reports, or any amendment
or amendments thereto, with the SEC and any stock exchange or similar authority,
pursuant to Section 16(a) of the Exchange Act. The undersigned hereby gives
notice to all who have received, relied on or acted upon such previously
executed power of attorney documents and all other interested parties that the
undersigned withdraws every power and authority thereby given and declares such
power of attorney documents null and void and of no further force or effect.

    IN WITNESS WHEREOF, the undersigned has caused this Limited Power of
Attorney to be executed as of this 1st day of March, 2021.

                                        Neil Johnston


                                        /s/ Neil Johnston
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