Matthew J. Mosellen

Matthew J. Mosellen serves as a key procurement professional within the Contract Administration Services Division of the Department of Homeland Security’s Office of Procurement Operations, where he supports the acquisition of mission-critical professional, scientific, and technical services essential to national security and operational readiness. His responsibilities include managing the full lifecycle of contracts for systems engineering, cybersecurity, and administrative consulting services, ensuring compliance with federal acquisition regulations and aligning procurements with DHS’s strategic technology and infrastructure goals. He routinely handles complex, performance-based solicitations requiring technical evaluation and risk mitigation, particularly in domains involving systems integrity and process optimization. Mosellen maintains collaborative relationships with a diverse range of federal contractors, including large primes and mid-tier firms specializing in IT services, systems engineering, and management consulting. While no single contractor dominates his portfolio, he consistently engages vendors with demonstrated expertise in custom programming, logistics consulting, and technical advisory services. His contracting approach emphasizes vendor performance accountability, clear statement of work development, and adherence to performance metrics, fostering long-term partnerships grounded in deliverable-driven outcomes. His procurement patterns reflect a strong preference for open competition, with approximately 90.9% of awards issued without set-asides, indicating a focus on broad market access and technical merit. However, he actively supports socioeconomic goals by allocating 9.1% of awards to SBA-certified Economically Disadvantaged Women-Owned Small Businesses (EDWOSB), demonstrating a measured but intentional commitment to diversity in the contractor base. Mosellen’s primary acquisition focus centers on NAICS 541611 (Administrative Management Consulting) and 541519 (Other Computer-Related Services), with significant activity in custom programming (541511) and logistics consulting (541614). He procures services that enhance DHS’s operational efficiency, including process improvement frameworks, cybersecurity support, and integrated systems management, reflecting deep expertise in technical service acquisition within high-stakes government environments.