Marianna Mezentseva

Marianna Mezentseva serves as a key procurement professional within the Bureau of Reclamation’s Mp-Regional Office, where she manages acquisitions critical to sustaining federal water infrastructure and environmental compliance. Her responsibilities center on executing contracts that support water quality monitoring, habitat restoration, and the operational maintenance of hydraulic structures. She specializes in technical service acquisitions aligned with the agency’s science-based mission, ensuring procurement activities adhere to federal regulations while advancing sustainability and ecosystem resilience. Her portfolio primarily includes environmental consulting and janitorial services essential to facility operations and regulatory adherence. Mezentseva maintains established working relationships with a core group of contractors, including TEPA EC, LLC and CDM Federal Programs Corporation for environmental engineering and compliance services, alongside McKenzie Construction & Site Development LLC for site-specific infrastructure support. She also regularly engages Berryessa Garbage Service, Inc. for waste management and janitorial services. Her contracting patterns reflect a preference for long-term, performance-based partnerships with vendors who demonstrate technical proficiency in federal environmental standards and operational reliability in remote or sensitive ecological zones. Her procurement strategy is deeply rooted in socioeconomic inclusion, with a consistent 50% set-aside preference for Small Business Set-Asides under FAR 19.5 and an equal emphasis on Women-Owned Small Businesses. This reflects a deliberate commitment to expanding opportunities for underserved entrepreneurs while ensuring competitive, high-quality service delivery. Her contracting patterns prioritize small business participation across both technical and support service categories, reinforcing the agency’s broader equity and resilience goals. Mezentseva’s primary NAICS focus is on 561720 (Janitorial Services) and 541620 (Environmental Consulting Services), reflecting her role in procuring facility maintenance and ecological assessment capabilities. She routinely sources services such as water sampling, contaminant analysis, habitat monitoring, and custodial operations for federal water facilities, demonstrating specialized expertise in environmental compliance and infrastructure support contracting within the Department of the Interior’s mission framework.