The Indian Health Service Kayenta Service Unit is conducting market research through a sources-sought notice to identify Indian-owned economic enterprises (IEE/ISBEE), while also inviting other capable firms, that can provide medical oxygen refill services at its facility, including removing empty cylinders, returning full cylinders, and testing cylinders and valves as needed. The anticipated contract is a base plus four option years. The agency will use responses to determine its acquisition strategy, considering Buy Indian Act opportunities first and then Small Business Act set-asides; the applicable NAICS code is 325998 with a 650-employee size standard. Interested firms must submit a company profile, capability statement, relevant past performance or contract vehicles, SAM.gov registration, and, for IEE/ISBEE respondents, a completed IHS IEE Representation Form. This notice is not a solicitation, and the government will not pay costs incurred in responding.