Amn Karel Mayo Castro

AB Karel Mayo Castro serves as a key procurement lead 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. Specializing in facility construction and systems integration, Castro manages acquisitions for building systems including electrical, plumbing, HVAC, and roofing, as well as structural construction for commercial, institutional, and industrial facilities. Their role ensures alignment with Air Force readiness goals by delivering mission-critical infrastructure through compliant, timely contracting processes that prioritize performance, safety, and long-term operational sustainability. Castro maintains a consistent working relationship with MCKENZIE CONSTRUCTION & SITE DEVELOPMENT LLC, a primary contractor engaged in facility upgrades and site development activities. The procurement pattern reflects a preference for established, capable small business partners with demonstrated expertise in integrated construction services and site logistics. These partnerships are built on reliability, compliance with federal construction standards, and proven track records in delivering complex facility projects under stringent Air Force operational constraints. A defining feature of Castro’s contracting approach is the exclusive use of Total Small Business Set-Aside authority under FAR 19.5, reflecting a robust commitment to socioeconomic inclusion. All procurements are structured to maximize opportunities for small businesses, ensuring equitable access to defense infrastructure contracts without reliance on large business set-asides or other socioeconomic categories. This policy reinforces the agency’s mandate to cultivate a resilient, diverse contractor base capable of supporting long-term installation readiness. Castro’s procurement portfolio is concentrated in three NAICS categories: 336214 (Travel Trailer and Camper Manufacturing), 336413 (Other Aircraft Parts and Auxiliary Equipment Manufacturing), and 561621 (Security Systems Services). These reflect a specialized focus on mobile support infrastructure, non-airframe aviation components, and perimeter security systems—all essential to base operations and force protection. Their expertise lies in procuring technically nuanced, mission-critical goods and services that bridge construction, logistics, and security domains within the defense infrastructure lifecycle.