The Department of Defense, specifically the Air Force Metrology and Calibration Program (AFMETCAL), is seeking sources for the Low Background Infrared (LBIR) Service Contract to support calibration and maintenance of critical infrared systems used by the Missile Defense Agency. The contract entails tasks such as operating and maintaining calibration chambers and refrigeration systems, as well as enhancing radiometric calibrations through research and design at the National Institute of Standards and Technology (NIST) facility in Gaithersburg, MD. This opportunity is vital for ensuring the operational efficiency of missile defense testing and calibration, which is crucial for the U.S. military's capabilities in missile interception. Interested parties must submit their responses by May 5, 2025, at 2:00 PM ET, and can contact Allen Kurella at allen.kurella@us.af.mil or by phone at 937-713-5843 for further information.