John McCallum

John McCallum serves as a Contracting Officer with the 250-NETWORK Contract Office 10 (36C250) under the Department of Veterans Affairs, where he is responsible for managing the acquisition of critical medical equipment, facility infrastructure, and technical support systems essential to veteran healthcare delivery. His portfolio focuses on procuring precision surgical instruments, electromedical devices, diagnostic systems, and facility upgrades to modernize VA clinical environments. McCallum employs full and open competition as the primary acquisition strategy, ensuring compliance with federal procurement regulations while aligning purchases with VA’s mission to deliver high-quality, safe, and accessible care. He maintains consistent working relationships with key contractors including WSSA LLC, OHIO AMBULANCE SOLUTIONS, LLC, INTEGRATED MAINTENANCE AND BUS SERVICES LLC, MGI, INC., and PROGENICS PHARMACEUTICALS INC., representing a mix of large and mid-tier vendors specializing in medical device manufacturing, facility maintenance, and healthcare logistics. His contracting approach emphasizes performance-based outcomes, rigorous technical evaluations, and long-term vendor accountability to ensure reliability and compliance in mission-critical environments. While the majority of his acquisitions—87.5%—are conducted under full and open competition, McCallum demonstrates a meaningful commitment to socioeconomic programs, particularly through Service-Disabled Veteran-Owned Small Business (SDVOSB) set-asides, which account for 10.7% of his awards. He also engages HUBZone firms, reflecting a balanced approach to small business inclusion without compromising operational readiness or technical requirements. His primary NAICS focus areas include Surgical Appliance and Supplies Manufacturing (339113), Surgical and Medical Instrument Manufacturing (339112), and Plumbing, Heating, and Air-Conditioning Contractors (238220), underscoring his expertise in procuring high-precision medical devices, clinical furnishings, and facility systems critical to VA hospital operations. McCallum’s technical proficiency spans biomedical engineering standards, facility codes, and clinical workflow integration, ensuring acquisitions meet both regulatory and patient-care imperatives.