Mary Esther Castillo

Mary Esther Castillo serves as a Contract Specialist within the FA3016 502 Cons Cl under the Department of the Air Force, where she plays a pivotal role in executing mission-critical acquisitions to sustain Air Force installations. Her responsibilities encompass the full lifecycle management of contracts for specialized maintenance, medical, and facility services, ensuring operational readiness through timely and compliant procurement of technologically advanced infrastructure. She routinely handles complex service-based acquisitions, including communications systems, data hosting, and technical training services, aligning each contract with strategic modernization goals for Air Force bases and support facilities. Castillo maintains consistent working relationships with a core group of contractors including PERRY MANAGEMENT CORP OF SOUTH DAKOTA, L.L.C, WILLIAM T BROOKS & ASSOCIATES INC, CITADEL FEDERAL SOLUTIONS LLC, NEXLEGACY LLC, and AJ COMMERCIAL SERVICES, INC. These partnerships reflect a preference for established vendors with proven expertise in facility operations, IT infrastructure, and technical workforce development. Her contracting approach emphasizes performance-based outcomes, rigorous contract administration, and long-term vendor reliability over transactional engagements. Her procurement activity reflects a 100% non-set-aside orientation, indicating a focus on full and open competition without socioeconomic set-asides such as 8(a), HUBZone, or SDVOSB preferences. This pattern underscores a mission-driven emphasis on technical capability and operational urgency over socioeconomic targeting, though she remains compliant with all federal small business participation requirements. Castillo’s primary NAICS focus areas—334290 (Other Communications Equipment Manufacturing), 518210 (Computing Infrastructure Providers), and 611519 (Other Technical and Trade Schools)—reveal deep specialization in communications hardware, cloud and data center services, and workforce training for technical roles. She procures mission-critical systems including secure network components, server infrastructure, and specialized instructional services to sustain Air Force communications and IT readiness across geographically dispersed installations.