Sean O'Brian

Sean O’Brian serves as a key procurement professional within the Missile Defense Agency, supporting the development and fielding of integrated ballistic missile defense systems. He manages complex acquisition programs focused on advanced sensor technologies, guidance systems, and midcourse/terminal-phase interception platforms, ensuring alignment with MDA’s layered defense architecture objectives. His work bridges technical innovation with acquisition execution, overseeing contracts for high-priority defense capabilities that require rigorous testing, systems integration, and rapid prototyping. O’Brian operates within a high-stakes, technology-driven environment where schedule adherence and technical fidelity are critical to national security. He maintains consistent working relationships with leading defense prime contractors including Lockheed Martin Corporation and Northrop Grumman Systems Corporation, partnering with them on large-scale system integration efforts and technology maturation initiatives. Jacobs Technology Inc. is also a frequent collaborator, particularly on engineering, testing, and logistics support services. These relationships are characterized by long-term strategic alignment, technical collaboration, and performance-based contract structures designed to meet evolving threat profiles. O’Brian’s procurement portfolio reflects a strict focus on full and open competition, with 100% of awards issued under no set-aside categories. There is no apparent use of 8(a), HUBZone, or SDVOSB set-asides, indicating a procurement strategy prioritizing technical capability and scale over socioeconomic preferences. This approach aligns with MDA’s mission-critical need for proven, high-performance systems delivered by industry leaders with deep aerospace and defense expertise. His primary procurement activity centers on NAICS 325120 (Industrial Gas Manufacturing) and 325199 (All Other Basic Organic Chemical Manufacturing), reflecting demand for specialized propellants, energetic materials, and chemical agents used in missile interceptors and warheads. Additionally, he supports acquisitions under NAICS 334310 (Audio and Video Equipment Manufacturing), indicating procurement of advanced electro-optical sensors, tracking systems, and signal processing hardware critical to missile defense surveillance and engagement architectures.