The United States Department of Agriculture (USDA) is seeking qualified contractors to provide a Performance Maintenance with Full Repair Service Plan for a UPLC/MS/MS instrument (Xevo TQ-S micro) at the Dairy and Functional Foods Research Unit located in Glenside, Pennsylvania. The selected contractor will be responsible for routine maintenance, replacement of wear parts, and comprehensive calibration and qualification checks to ensure the instrument's optimal performance, which is critical for ongoing research into the impact of diet on gut microbiota. This maintenance support is essential for the timely and accurate analysis of data derived from various samples, facilitating vital scientific research concerning food and health interactions. Interested parties should submit their responses to Dilynn Rogers at dilynn.rogers@usda.gov by September 9, 2024, at 10 AM EST, as this is a Sources Sought announcement for market research purposes only, and no contract will be awarded based solely on the responses.