The Department of Defense, through the Naval Air Warfare Center Aircraft Division, is seeking a contractor to provide one year of OEM hardware and software maintenance for the Propulsion Systems Evaluation Facility (PSEF)'s HGL Dynamics DDAS system. The procurement includes essential services such as software updates, repair or replacement of defective hardware, temporary systems provision during testing impacts, phone support, and up to two site visits, all to be delivered at the Patuxent River Naval Air Station. This contract, valued on a firm fixed-price basis, is critical for maintaining operational readiness and efficiency of the PSEF's testing capabilities, with a performance period from January 1, 2026, to December 31, 2026. Interested parties must submit their brand name quotes by 12:00 pm on December 20, 2025, to Benjamin Flores at benjamin.r.flores3.civ@us.navy.mil, ensuring compliance with all specified requirements.