NASA's Shared Services Center awarded a purchase order to RJ Lee Group Inc. for ISS Aerosol Passive Sampler Analysis valued at $64,686.00 with an award date of July 24, 2025. No set-aside applies. Work is performed in Cleveland, Ohio. The order covers advanced microscopic and spectroscopic analysis of 8 passive samplers containing 40 samples collected from the International Space Station, with ultimate completion by December 30, 2026. The procurement was conducted as a sole-source acquisition under FAR 13.106-1(b)(1)(i) authority, with the originating Special Notice issued July 11, 2025 and due July 16, 2025. The contract is priced firm fixed price and treats the services as commercial items under FAR Parts 12 and 13.