NASA's National Aeronautics and Space Administration (NASA) is seeking a contractor for the maintenance of Mail X-Ray Machines, specifically the Rapiscan X-Ray equipment, through a contract managed by the NASA Shared Services Center. The contractor will be responsible for providing trained personnel to conduct periodic cleaning, preventive maintenance, software configuration, connectivity verification, testing, and documentation of all maintenance performed, as well as offering support and repair services as needed. This maintenance contract is crucial for ensuring the operational efficiency and reliability of the X-ray machines used at NASA Headquarters. The contract will commence on January 1, 2026, and will include a base year followed by four option years, extending through December 31, 2030. Interested organizations may submit their capabilities by December 22, 2025, to be considered for potential competitive procurement, with inquiries directed to Lindsey McLellan at lindsey.m.mclellan@nasa.gov.