The Department of Agriculture, specifically the Agricultural Research Service (ARS), is seeking qualified vendors for a Flex Choice Service Contract focused on the maintenance and support of the Waters H-Class UPLC system equipped with a QDa mass-sensitive detector. The procurement requires one annual Preventative Maintenance (PM) visit, unlimited high-priority Corrective Maintenance (CM) visits, and ongoing online and phone support, all to be conducted by Waters-trained engineers using genuine Waters parts to ensure system reliability and performance. This service is critical for maintaining the operational efficiency of advanced analytical systems used in monitoring ingredient levels and performance quality of dietary supplements. Interested parties must submit their capability statements and other required documentation to Elizabeth Wilson at elizabeth.wilson2@usda.gov by November 7, 2024, at 2:00 PM PDT, as this notice is part of the USDA ARS market research and does not constitute a solicitation for proposals.