Principal Systems Engineer - Design Agent (Onsite)

This engineer will support the Guided Missile Weapon System lifecycle by maintaining technical specifications, developing and managing requirements, and ensuring engineering rigor across development and production efforts. The position works with internal engineering teams, industry partners, and customers on performance studies, obsolescence updates, project status, and technical deliverables. It also includes mentoring systems engineers, coordinating cross-functional teams, supporting budgets, and applying improved processes, agile methods, automation, and continuous integration. The role suits an experienced systems engineer with missile or defense-system knowledge, strong requirements and verification experience, and the ability to lead technical work independently while communicating effectively with technical and nontechnical stakeholders. The position is onsite in Tucson and requires an active Secret clearance and U.S. citizenship.