DUNCAN MECHANICAL SERVICES, INC.

Duncan Mechanical Service, Inc. specializes in the installation, repair, and replacement of large-scale commercial HVAC systems, with proven expertise in chiller maintenance and critical climate control infrastructure for mission-critical facilities. Their work centers on high-capacity refrigeration systems, including 250-ton chiller units, requiring precise refrigerant handling, electrical integration, and mechanical coordination in secure government environments. The contractor demonstrates technical proficiency in system diagnostics, retrofitting legacy equipment, and delivering firm-fixed-price solutions under stringent operational constraints, ensuring uninterrupted environmental control in sensitive installations. The company has delivered services directly to the Department of Defense, performing facility-specific mechanical upgrades at U.S. Air Force installations. Their engagements involve complex, time-sensitive repairs and replacements of chilled water systems essential to building climate control, data center cooling, and personnel comfort in military infrastructure. These projects require strict adherence to DoD facility standards, safety protocols, and maintenance documentation, indicating a consistent ability to operate within regulated defense environments. Duncan Mechanical Service, Inc. is primarily focused on NAICS 238220 — Plumbing, Heating, and Air-Conditioning Contractors — with a clear specialization in industrial and institutional HVAC applications. Their market positioning is defined by hands-on, field-based execution of mechanical systems in federal and defense facilities, distinguishing them as a contractor that delivers precision mechanical services rather than broad construction or design-build solutions. As a small business structured as a 2L entity based in San Angelo, Texas, the company operates with a lean, regional footprint focused on direct field service delivery. While currently holding no formal government certifications, their demonstrated ability to execute complex HVAC work for defense clients positions them as a reliable vendor for mission-critical mechanical repairs in austere or high-security settings.