The Department of Defense, through the Naval Sea Systems Command (NAVSEA), is issuing a Class Justification and Approval for the modernization and maintenance of USS ZUMWALT (DDG 1000) and USS MICHAEL MONSOOR (DDG 1001), limiting competition to Huntington Ingalls Incorporated (HII), Ingalls Shipbuilding Division. The procurement focuses on the removal of Advanced Gun System mounts and the installation of Conventional Prompt Strike capable Large Missile Vertical Launch Systems on both destroyers, with modernization for DDG 1000 scheduled from October 2023 to June 2025, and for DDG 1001 from FY26 to FY28. This acquisition is critical due to the technical complexity involved and the need to avoid operational delays, as alternative sources lack the necessary experience and resources, which could jeopardize the project timeline and efficiency. Interested parties can contact Christopher Pellecer at christopher.pellecer@navy.mil or Devon Peck at devon.l.peck.civ@us.navy.mil for further information, with the acquisition valid until September 30, 2028.