This is a Request for Information (RFI) seeking facilities to validate chamber and team capabilities for NASA decompression sickness (DCS) studies. The work requires three test days (with a possible fourth) involving subject screening, a 6.5-hour prebreathe, and a 6-hour simulated EVA at 5.2 psia, all within a single work week. The budget is firm fixed price, with payments tied to interim milestones set by the supplier. All work must be completed within 5 months of IRB approval, with optional work required before calendar 2028. The location for performance of services is not specified.