The Department of Defense, through the Naval Sea Systems Command, intends to issue a sole source solicitation for continued engineering and technical support for the US Mark 11 (MK11) Sea, Air, and Land (SEAL) Delivery Vehicles (SDV). The procurement aims to provide support for engineering change proposals, in-service maintenance, repairs, and other direct costs associated with the MK11 SDV systems, with a contract modification that includes a base period and four option years starting in FY 2025. This contract will be awarded to Teledyne Brown Engineering, Inc., the incumbent contractor, as they possess the unique knowledge and capabilities necessary to fulfill the Government's requirements without causing delays. Interested parties may submit responses by 12:00 AM EST on July 25, 2025, to Christopher Russell at christopher.s.russell34.civ@us.navy.mil, referencing solicitation number N00024-25-R-6124.