Gabriel Castellanos

Gabriel Castellanos serves as a key procurement professional within the DSC Contracting Services Division of the National Park Service, overseeing the acquisition of critical infrastructure services essential to preserving and modernizing America’s national parks. His work centers on managing contracts for the rehabilitation of historic structures, upgrades to water and sewer systems, and the construction of visitor facilities in ecologically sensitive and remote locations. He handles complex, mission-critical acquisitions under the Federal Acquisition Regulation, ensuring compliance with environmental, historic preservation, and public safety standards while aligning procurements with the NPS’s long-term stewardship goals. Castellanos maintains consistent working relationships with leading engineering and construction firms, including AECOM Technical Services, Vanasse Hangen Brustlin, Johnson, Mirmiran & Thompson, HDR Engineering, and McKenzie Construction & Site Development. These partnerships reflect a preference for firms with demonstrated expertise in civil infrastructure, historic restoration, and utility system modernization. His procurement approach emphasizes performance-based contracting, requiring technical proficiency in geotechnical analysis, sustainable construction methods, and compliance with National Historic Preservation Act requirements. His contracting portfolio is evenly split between total small business set-asides under FAR 19.5 and open competitions, demonstrating a balanced commitment to fostering small business participation without compromising technical capability. He actively leverages small business set-asides to support qualified contractors with proven experience in park infrastructure, reinforcing the agency’s socioeconomic goals while maintaining project integrity. Castellanos specializes in NAICS 237110 (Water and Sewer Line Construction) and 236220 (Commercial and Institutional Building Construction), focusing on projects involving stormwater management, septic and wastewater system upgrades, adaptive reuse of historic buildings, and accessibility-compliant facility expansions. His technical domain expertise spans civil engineering, environmental compliance, and heritage preservation, ensuring that all procurements meet the unique demands of federal land management and public access in protected areas.