Portsmouth Naval Shipyard is conducting market research to identify sources capable of a firm-fixed-price effort to refurbish CO2 scrubber and burner equipment—including motors, mounts, and heater boxes—on a Los Angeles Class submarine. This is a sources-sought notice only; no solicitation is available, and responses will not be accepted as offers or form a binding contract. Interested firms should submit organization details and tailored capability statements demonstrating relevant organizational and staff capability. Questions may be emailed to Gordon Roberts at Gordon.j.robertsl@navy.mil; telephone inquiries will not be accepted or acknowledged, and no feedback will be provided on submissions.