This full-time onsite role in Scottsdale, Arizona, seeks a Senior Systems Engineer to join a cross-functional team designing and integrating critical Ground Systems for Department of Defense customers. The position requires an active Top Secret/SCI clearance and US citizenship. Key responsibilities include performing requirements analysis, system design, and technical trade studies while ensuring all solutions meet strict governmental security specifications. The engineer will also lead system accreditation efforts, manage complex interfaces, and apply agile methodologies to decompose requirements efficiently. This opportunity appeals to professionals seeking to work on high-impact defense projects with a focus on innovation, including the application of AI for continuous improvement. The role offers the chance to solve complex technical challenges and provide leadership within a specialized engineering environment.