Sarah Clemmens

Sarah Clemmens serves as a Contract Specialist within the DSC Contracting Services Division of the National Park Service, where she manages the full lifecycle of complex infrastructure and environmental contracts critical to preserving America’s national parks. Her work centers on acquiring construction, engineering, and environmental consulting services to rehabilitate historic structures, modernize water and sewer systems, and enhance visitor facilities across ecologically sensitive and remote landscapes. She ensures compliance with federal acquisition regulations while aligning procurements with the agency’s strategic goals of resilience, sustainability, and cultural preservation. Clemmens maintains long-standing relationships with leading engineering and construction firms including AECOM Technical Services, Inc., Vanasse Hangen Brustlin, Inc., Johnson, Mirmiran & Thompson, Inc., HDR Engineering Inc., and McKenzie Construction & Site Development LLC. These partnerships reflect her focus on technical expertise in civil infrastructure, environmental remediation, and institutional building construction. She collaborates closely with these vendors to deliver mission-critical projects under firm-fixed-price and cost-reimbursement contract types, emphasizing performance-based outcomes and rigorous oversight. Her procurement approach prioritizes open competition, with 84.6% of her acquisitions conducted without set-asides, reflecting the technical complexity and scale of required services. However, she consistently supports small business participation, allocating 15.4% of her portfolio to total small business set-asides under FAR 19.5, demonstrating a balanced commitment to both efficiency and socioeconomic goals. Clemmens specializes in NAICS codes 237110 (Water and Sewer Line Construction) and 236220 (Commercial and Institutional Building Construction), with significant activity in environmental consulting (541620) and engineering services (541330). Her domain expertise spans civil infrastructure rehabilitation, utility system modernization, and compliance with environmental regulations, making her a key facilitator of sustainable, mission-driven acquisitions for the National Park Service.