Brian Tollensdorf

Brian Tollensdorf serves as a key procurement professional within the DSC Contracting Services Division of the National Park Service, overseeing the acquisition of critical infrastructure and engineering services essential to preserving America’s national parks. He manages a diverse portfolio of construction and technical service contracts focused on rehabilitating historic structures, upgrading utility systems, and enhancing visitor facilities across ecologically sensitive and remote landscapes. His work directly supports the agency’s mission to maintain resilient, sustainable infrastructure while adhering to federal procurement regulations and environmental compliance standards. Tollensdorf maintains consistent working relationships with a select group of specialized contractors, including HDR Engineering Inc., Johnson, Mirmiran & Thompson, Inc., McKenzie Construction & Site Development LLC, BookCliff Partners, LLC, and Aleut Construction LLC. These partnerships reflect a preference for firms with proven expertise in heavy civil construction, historic preservation, and remote-site engineering. His procurement approach emphasizes long-term vendor collaboration, technical capability, and proven performance on complex, mission-critical projects requiring adherence to strict environmental and cultural resource protections. His contracting patterns reveal a strong emphasis on small business participation, with 42.9% of awards structured as total small business set-asides under FAR 19.5, indicating a deliberate commitment to expanding opportunities for qualified small firms. While the majority of acquisitions are open to all competitors, his consistent use of small business set-asides demonstrates active support for socioeconomic programs and the inclusion of diverse contractors in high-impact infrastructure projects. Tollensdorf’s primary procurement focus lies in NAICS 237990 (Other Heavy and Civil Engineering Construction), reflecting his leadership in large-scale civil works such as water, sewer, and road systems within park boundaries. He also regularly procures architectural services (NAICS 541310) and pest control services (NAICS 561710) to support facility maintenance and ecological integrity. His domain expertise centers on mission-critical infrastructure rehabilitation, with deep familiarity in federal construction standards, historic preservation guidelines, and environmental mitigation requirements.