This is a Notice of Intent to award a sole-source, firm-fixed-price contract to Cytek Biosciences Inc. for maintenance services on a specific Cytek Amnis Imagestream MKII instrument. The period of performance is from May 20, 2026, to May 19, 2027. The work will be performed at a BSL-II/III lab (6A30, Building 10) for the National Institute of Allergy and Infectious Diseases. The justification is that Cytek is the sole authorized provider of service and parts for this essential equipment, which is critical for ongoing HIV-related clinical research. While not a solicitation, interested vendors may submit a capability statement for government consideration.