CSSI, LLC

CSSI, LLC specializes in engineering services and technical support for complex federal transportation and defense systems, with deep expertise in safety analysis, mission-critical infrastructure support, and systems integration. The firm delivers engineering solutions for aviation and surface transportation safety programs, including separation standards analysis, ATO mission support, and system capacity evaluation. Their technical capabilities span policy implementation, data-driven performance assessment, and on-site integration of navigation and surveillance systems, particularly for FAA and DoD programs. CSSI excels in bridging regulatory requirements with operational technology, ensuring compliance with federal aviation and defense standards through rigorous systems engineering and lifecycle support. The contractor maintains a strong, sustained relationship with the Department of Transportation, where they provide engineering and infrastructure support for safety reporting systems, EFAST program enhancements, and policy implementation tasks. They also deliver critical engineering services to the Department of Defense, particularly in navigation systems integration and program support for aviation and surveillance platforms. These engagements reflect a pattern of recurring, mission-critical work focused on system reliability, regulatory compliance, and operational continuity. CSSI’s primary focus lies in engineering services (NAICS 541330), with complementary work in research and development (541712) and computing infrastructure (518210). Their market positioning centers on federal transportation safety, aviation systems modernization, and defense technology integration—areas requiring precise technical execution and deep domain knowledge of federal regulatory frameworks. As a 2L entity headquartered in Washington, DC, CSSI operates as a small, agile contractor with a focused presence in the federal government market. While currently holding no formal certifications, the firm’s consistent award history demonstrates proven competency in delivering high-stakes technical services to mission-critical agencies without reliance on set-aside programs.