Senior DoD ISSM — RMF/ATO Leadership

Cornerstone Defense LLC is seeking a Senior Information System Security Manager to oversee the cybersecurity posture for DoD systems in Odenton, MD. You will own the RMF lifecycle, ensure ATO readiness, and develop robust security documentation in alignment with DoD standards. The role requires active DoD Secret clearance, substantial RMF experience, and the ability to coordinate across engineering and program teams to maintain secure, compliant environments.