Power of Attorney for Matthew Joyce

This filing documents a Power of Attorney granted by Matthew Joyce, SVP, Lubricants & Specialties at HF Sinclair Corp, to Eric L. Nitcher, Harrison Morris, and Rita Townsend. This authorization allows them to manage his filings with the SEC, including obtaining EDGAR credentials, executing Forms 3, 4, and 5, and managing his EDGAR account. The Power of Attorney also covers the delegation of authority to HF Sinclair Corporation for managing these filings. Matthew Joyce retains responsibility for compliance with SEC regulations, and the attorneys-in-fact are indemnified against losses arising from inaccurate or untimely information provided by Joyce. The Power of Attorney remains in effect until Joyce is no longer required to file these forms or maintain the EDGAR account, unless earlier revoked.