Security Specialist

ManTech International seeks an SCI Security Specialist to support sensitive national security missions. In this role, you will manage SCI security programs, enforce TS/SCI access and physical security controls, and ensure compliance with DoD and Intelligence Community directives. Responsibilities include administering personnel security, conducting inspections, responding to incidents, maintaining security documentation, and briefing staff on security procedures. You'll partner with cyber, IT, and mission teams in a mission-focused, collaborative environment with strong training, career growth, and veteran-friendly opportunities.