The Department of Defense, through the Defense Health Agency (DHA), intends to award a sole source contract for Environmental Monitoring Technical and Maintenance Services to Rees Scientific Corporation. This contract will provide essential maintenance services, including annual system revalidation and technical support for a government-owned environmental monitoring system with 1,200 inputs across seven management nodes, ensuring compliance with healthcare quality standards. The contract is crucial for maintaining operational efficiency and safety at the Walter Reed National Military Medical Center in Bethesda, Maryland, with an estimated performance period from May 1, 2025, to April 30, 2030. Interested parties must express their capabilities by March 21, 2025, via email to Judith S. Meynard and Erica S. Oh, as this notice is not a request for competitive proposals.