Power of Attorney for SEC Filings

This filing documents a Power of Attorney granted by Jacinto J. Hernandez to Adam M. Vela, Marcus G. Bolinder, Christopher J. Kirt, and Edward T. Highberger. This authorization allows the appointed individuals to act on behalf of Mr. Hernandez in all matters related to filing forms with the U.S. Securities and Exchange Commission (SEC) concerning Devon Energy Corporation. Specifically, the attorneys-in-fact are empowered to handle EDGAR system enrollments, prepare and submit Form ID, obtain necessary codes and passwords, manage the EDGAR account, and execute Forms 3, 4, and 5 as required by Section 16(a) of the Securities Exchange Act of 1934. They can also perform any other actions deemed necessary or beneficial for Mr. Hernandez, including making necessary filings and ensuring compliance. This Power of Attorney supersedes any previous similar authorizations and remains in effect until revoked in writing. The filing indicates that Mr. Hernandez is a director of the company and that this power of attorney was executed on May 7, 2026.