Power of Attorney for Jeffery S. McElfresh

This document is an Exhibit 24.1, a Power of Attorney granted by Jeffery S. McElfresh, identified by CIK 0001734431. The power of attorney was signed on October 5, 2026, by Ramune M. Kligys on behalf of Jeffery S. McElfresh. The reporting owner, Jeffery S. McElfresh, resides at 1750 Presidents Street, Reston, VA 20190. He is listed as a Director (isDirector: 1) of Leidos Holdings, Inc. (CIK 0001336920, Ticker: LDOS). The period of report is October 1, 2026. The document indicates no securities owned directly or indirectly, with