Exhibit 24.1 POWER OF ATTORNEY For Managing Form ID and Executing Forms 3, 4 and 5, Form 144 and Schedules 13D and 13G Known by all these present, that the undersigned hereby constitutes and appoints Kevin McDonald the undersigned's true and lawful attorney-in-fact (herein so called) to: 1. prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to the United States Securities and Exchange Commission (the SEC) a Form ID, Uniform Application for Access Codes to File on EDGAR and any other documents necessary or appropriate to obtain or maintain 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, and the rules thereunder (collectively, the Exchange Act), or any other rule or regulation of the SEC; 2. execute for and on behalf of the undersigned (a) Forms 3, 4 and 5 (including amendments thereto) in accordance with Section 16(a) of the Exchange Act , (b) Form 144 and (c) Schedules 13D and 13G (including amendments thereto) in accordance with Sections 13(d) and 13(g) of the Exchange Act, but only to the extent each such form or schedule relates to the undersigned's beneficial ownership of securities of NexTier Oilfield Solutions Inc. or any of its affiliates, subsidiaries or successors (collectively, NexTier); 3. do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such Form 3, 4 or 5, Form 144 or Schedule 13D or 13G (including amendments thereto) and timely file such Forms or Schedules with the SEC and any stock exchange, self-regulatory association or any other authority, and provide a copy as required by law or advisable to such persons as the attorney-in-fact deems appropriate; and 4. take any other action of any type whatsoever in connection with the foregoing that, in the opinion of the attorney-in-fact, may be of benefit to, in the best interest of, or legally required of the undersigned, it being understood that the documents executed by the 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 the attorney-in- fact may approve in the attorney-in-fact's discretion. The undersigned hereby grants to the attorney-in-fact full power and authority to do and perform all 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 the attorney-in-fact, or such attorney-in- facts substitutes or substitute, 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 attorney-in-fact, and his substitutes, in serving in such capacity at the request of the undersigned, are not assuming (nor is NexTier) any of the undersigned's responsibilities to comply with Section 16 of the Exchange Act. The undersigned hereby agrees that the attorney-in-fact may rely entirely on information furnished orally or in writing by or at the direction of the undersigned to the attorney-in-fact. The undersigned also agrees to indemnify and hold harmless NexTier and the attorney-in-fact against any losses, claims, damages or liabilities (or actions in these respects) that arise out of or are based upon any untrue statements or omissions of necessary facts in the information provided by or at the direction of the undersigned, or upon the lack of timeliness in the delivery of information by or at the direction of the undersigned, to the attorney-in-fact for purposes of executing, acknowledging, delivering or filing Forms 3, 4 or 5, Form 144 or Schedule 13D or 13G (including amendments thereto) and agrees to reimburse NexTier and the attorney-in-fact on demand for any legal or other expenses

reasonably incurred in connection with investigating or defending against any such loss, claim, damage, liability or action. This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5, Form 144 and Schedules 13D and 13G (including amendments thereto) with respect to the undersigned's holdings of and transactions in securities issued by NexTier, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact. This Power of Attorney revokes all other powers of attorney that the undersigned has previously granted concerning the matters described herein.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of the date written below. Signed by: /s/ Oladipo Iluyomade Date: January 18, 2022