The Department of Defense, through the Naval Sea Systems Command (NAVSEA HQ), is seeking to modify an existing contract with Damen Naval for design and engineering support related to the Medium Landing Ship (LSM) Program, specifically the Damen Naval Landing Ship Transport 100 (LST 100). This procurement aims to provide essential engineering support as the LST 100 has been designated as the official design basis for the LSM Block 1. The contract action will be negotiated on a sole source basis, as only Damen Naval can fulfill the requirements, and interested parties may submit their interest and capability within fifteen days of this notice. For further inquiries, interested parties can contact Nicholas Boyles at nicholas.w.boyles.civ@us.navy.mil or Elizabeth Feliciano at elizabeth.feliciano-hernandez.civ@us.navy.mil.