The National Institutes of Health requires a contractor to operate the NIH Tetramer Core Facility, which synthesizes and distributes custom MHC multimer reagents for biomedical research. The contractor will provide production, distribution, program management, and website services, requiring an estimated 9 Full-Time Equivalents annually. The anticipated period of performance is a one-year base period starting on or about March 21, 2027, plus six one-year option periods for a potential total of seven years. The contract will be a cost-reimbursement, term type contract. Proposals must be submitted online via the NIAID electronic Contract Proposal Submission (eCPS) website.