The Department of Defense, through the Naval Sea Systems Command (NAVSEA), intends to issue a modification to contract N00024-15-C-5151 for AEGIS Ship Integration and Test (SI&T) services, specifically to Lockheed Martin Rotary and Mission Systems. This modification will extend the performance period by an additional six months to support combat system equipment testing and troubleshooting for the Aegis Combat System on various classes of naval ships, including new construction Aegis Destroyers and in-service Aegis Cruisers, as well as land-based tactical sites and Ballistic Missile Defense capability upgrades. The modification is justified under 10 U.S.C. 2304(c)(1) due to Lockheed Martin being the only source capable of meeting the government's requirements within the necessary timeframe. Interested parties are encouraged to express their interest and capabilities within 15 days of this notice, although this is not a request for competitive proposals. For further inquiries, contact Robert Larkin at robert.j.larkin25.civ@us.navy.mil or Michael Peduto at michael.p.peduto2.civ@us.navy.mil.