Noble (NE) Form 3 Noble / Melanie Montague Trent ownership change

                                                                      Exhibit 24

                               POWER OF ATTORNEY

        Know all by these presents, that the undersigned hereby constitutes and
appoints each of William E. Turcotte, Richard B. Barker and Priscilla Heistad,
signing singly, as the undersigned's true and lawful attorney-in-fact, with full
power and authority to:

        (1)   prepare, execute in the undersigned's name and on the
              undersigned's behalf, and submit to the U.S. Securities and
              Exchange Commission (the "SEC") a Form ID, including amendments
              thereto, and any other documents necessary or appropriate to
              obtain codes and passwords enabling the undersigned to make
              electronic filings with the SEC of reports required by Section
              16(a) of the Securities Exchange Act of 1934, as amended (the
              "Exchange Act"), or any rule or regulation of the SEC;

        (2)   prepare, execute, deliver and file for and on behalf of the
              undersigned, in the undersigned's capacity as an officer and/or
              director of Noble Corporation, an exempted company incorporated in
              the Cayman Islands with limited liability (the "Company"), Forms
              3, 4 and 5, or any amendment thereto, in accordance with Section
              16(a) of the Exchange Act and the rules promulgated thereunder,
              and any other forms or reports the undersigned may be required to
              file in connection with the undersigned's ownership, acquisition
              or disposition of securities of the Company;

        (3)   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, including any electronic filing
              thereof, complete and execute any amendment or amendments thereto,
              and timely file such form with the SEC and any stock exchange or
              similar authority;

        (4)   seek or obtain, as the undersigned's representative and on the
              undersigned's behalf, information on transactions in the Company's
              securities from any third party, including brokers, employee
              benefit plan administrators and trustees, and the undersigned
              hereby authorizes any such person to release any such information
              to the attorney-in-fact for the undersigned and approves and
              ratifies any such release of information; and

        (5)   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 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 Power of Attorney shall remain in full force and effect until (i)
the undersigned is no longer required to file Forms 3, 4 and 5 with respect to
the undersigned's holdings of and transactions in securities issued by the
Company, (ii) the date that this Power of Attorney is revoked by the undersigned
in a signed writing delivered to any of the foregoing attorneys-in-fact or (iii)
the date that the applicable attorney-in-fact is no longer employed by the
Company or any of its affiliates. For the avoidance of doubt, this Power of
Attorney may cease to be in effect for one or more of the attorneys-in-fact
named herein while still being in effect for one or more of the other attorneys-
in-fact named herein.


        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 3rd day of June, 2021.

                                        /s/ Melanie M. Trent
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                                              Signature

                                        Melanie M. Trent
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                                              Print Name