A1C Karel Mayo Castro

A1C Karel Mayo Castro serves as a procurement specialist within the FA4528 5 Cons, a unit of the Department of the Air Force responsible for sustaining and modernizing critical infrastructure at Air Force installations. In this role, Castro manages acquisitions for building systems integration, including electrical, plumbing, HVAC, and roofing services, as well as structural construction for commercial, institutional, and industrial facilities. Their work directly supports the agency’s mission to ensure operational readiness through resilient, code-compliant facilities, coordinating with engineers and project managers to align contract requirements with technical specifications and lifecycle sustainability goals. Castro maintains a consistent working relationship with MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC, a primary contractor for site development and facility construction services. The partnership reflects a preference for experienced general contractors capable of delivering complex, multi-trade projects under tight operational timelines. While the relationship is primarily performance-driven, Castro actively encourages competitive bidding and vendor diversity to ensure quality and accountability across the procurement lifecycle. A strong commitment to small business participation defines Castro’s contracting approach, with 75% of acquisitions structured as Total Small Business Set-Asides under FAR 19.5. This reflects a deliberate strategy to foster economic opportunity within the defense supply chain, prioritizing small businesses with demonstrated capability in construction, maintenance, and facility support services. While no set-asides are used for the remaining 25%, those procurements still emphasize fair competition and transparency. Castro’s procurement focus centers on NAICS categories including 332216 (saw blade and handtool manufacturing), 811210 (electronic and precision equipment repair), and 332311 (prefabricated metal building components). These reflect a technical emphasis on specialized tools, facility maintenance systems, and modular construction elements critical to installation resilience. Their expertise lies in bridging operational needs with niche industrial supply chains, ensuring that even low-volume, high-precision procurements meet rigorous Air Force standards.