The CDC intends to award a sole source contract to the American Association for Laboratory Accreditation (A2LA) for Laboratory Testing and Research Accreditation Assessment Services, specifically for expertise in environmental Legionella testing under ISO/IEC 17025. Only A2LA routinely maintains assessors with this specialized capability, as other U.S. accrediting bodies lack it and international providers are cost-prohibitive due to travel costs. Responses to this notice must be emailed to the contract specialist by close of business on 01 June 2026. No budget amount is specified. The services will be performed at the contractor’s location, as no performance location is mentioned.