The Department of Transportation, specifically the Federal Aviation Administration (FAA), is seeking to award a Time and Material, Indefinite Delivery/Indefinite Quantity contract for technical support in Separation Standards Analysis to CSSI, Inc. This contract will involve engineering services that support research, testing, and validation of advanced aviation separation and airspace concepts, crucial for developing future airspace separation minima and ensuring the safety of the National Airspace System (NAS). The FAA has determined that CSSI, Inc. is the only firm with the necessary expertise to perform this critical work, which includes assessments related to emerging technologies and procedures in aviation safety. Interested parties can contact Maria Wells at maria.j.wells@faa.gov or call 609-485-6371 for further information, noting that this is a single-source procurement and not a request for proposals.