Donald Tremble

Donald Tremble serves as the primary contracting lead for the National Park Service’s Arizona region (Agency Code: 140P15), overseeing the acquisition of mission-critical infrastructure and environmental support services essential to preserving national park resources. His responsibilities include managing the full lifecycle of procurements—from needs assessment and solicitation to contract award and performance monitoring—focusing on projects that ensure safe public access and ecological integrity within park boundaries. Tremble routinely handles acquisitions related to water systems, electrical infrastructure, environmental remediation, and specialized vehicle equipment, aligning each procurement with the agency’s mandate to sustain natural and cultural heritage through resilient, low-impact solutions. His contractor relationships are characterized by a broad but lean vendor base, with no single contractor dominating award volume. He engages a diverse network of specialized firms, including electrical contractors, pump equipment manufacturers, and environmental remediation specialists, often selecting vendors based on technical expertise, environmental compliance, and past performance rather than market concentration. This approach fosters competitive bidding and encourages innovation from niche providers capable of meeting the unique operational demands of remote park environments. Tremble maintains a strong commitment to small business participation, with 34% of his acquisitions set aside for total small business contracts under FAR 19.5. While no other socioeconomic set-asides (such as 8(a), HUBZone, or SDVOSB) dominate his portfolio, his consistent use of small business set-asides reflects a deliberate strategy to cultivate local and regional vendors with proven capabilities in park-specific infrastructure. This pattern supports economic development in surrounding communities while ensuring responsive, agile contract execution. His procurement focus centers on NAICS codes 336320 (motor vehicle electrical systems), 238210 (electrical contracting), 562910 (remediation services), and 221310 (water supply systems), indicating deep expertise in sustainable infrastructure modernization. He frequently procures specialized equipment for wastewater treatment, water distribution, and park vehicle electrification, demonstrating technical fluency in environmental engineering and resource conservation technologies.