The Department of Defense, through the Army Medical Research Acquisition Activity, intends to issue a sole source contract for preventive maintenance of specialized laboratory equipment at the Walter Reed Army Institute of Research in Silver Spring, Maryland. The contract will be awarded to Life Technologies Corporation, a subsidiary of Thermo Fisher Scientific, which is the only responsible source capable of providing the unique maintenance and calibration services required for the proprietary laboratory instruments owned by the Diagnostic Countermeasures Branch. This maintenance is critical to ensure the operational integrity and reliability of the specialized equipment used in defense health research. Interested parties should note that this is a sole source opportunity, and further inquiries can be directed to the Army Medical Research Acquisition Activity for additional details.