This is a cost-plus-fixed-fee contract awarded by the Department of Homeland Security's Science and Technology Directorate to The Johns Hopkins University Applied Physics Laboratory LLC (APL) to provide funding for a testbed to support the Deployable Aerosol Collection System program. The contract has a ceiling value of $2,027,416.57 and a period of performance through July 14, 2025. There is no set-aside designation for this award. APL is a university-affiliated research center that provides research and development services to federal agencies, and has received numerous prime and subcontract awards from the Department of Defense, NASA, and other civilian agencies in areas like defense technology, cybersecurity, and modeling and simulation. The Johns Hopkins University, APL's parent organization, is a private research university that also holds significant federal contract and grant awards, particularly in biomedical research, public health, and scientific analysis.