The National Institute on Aging (NIA) is soliciting proposals for the development and maintenance of an Aged Rodent Tissue Bank under a single cost reimbursement plus fixed fee contract. The contract will include a one-year base period and four one-year options, with performance expected to start around March 2027. No specific budget amount is provided in the description. The location for performance of services is not specified. All proposals must be submitted via the electronic Contract Proposal Submission (eCPS) website.