This is a sources sought announcement for market research only, not a solicitation, for Radiological Physics Testing & Inspection Services to support the VA San Francisco Health Care System. Interested firms must demonstrate capability to perform the draft Statement of Work, including holding a current medical physicist license, ABR/ABMP board certification, meeting specific SOW qualifications, providing emergency services, and performing QC on all listed medical equipment. Respondents should describe relevant experience, similar projects, socioeconomic status, and SAM/UEI information, and note that small businesses must comply with FAR limitations on subcontracting, with at least 50% of personnel costs expended on their own employees. Interested parties should respond by email to the contracting officer’s address.