Senior ISSE; TS/SCI; RMF & Cloud Security
Listed on 2026-11-05
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IT/Tech
Cybersecurity, Security Management & Operations, Information Security & Data Protection, Network Security
Cornerstone Defense is seeking a highly skilled Senior Information Systems Security Engineer (ISSE) with TS/SCI and polygraph to secure mission-critical systems across hybrid, cloud, and air-gapped environments in Reston, VA. You will design, engineer, assess, and sustain security controls, ensuring compliance and mission resilience.
Responsibilities include implementing security solutions (firewalls, SIEM, vulnerability scanning), conducting RMF/NIST 800-53 controls, STIG checks, and incident
Consider building your career as a Senior ISSE (TS/SCI) - RMF & Cloud Security at Cornerstone Defense LLC.
The following opportunity is for a Senior ISSE (TS/SCI) - RMF & Cloud Security with Cornerstone Defense LLC.
Our team is growing, and we are hiring a Senior ISSE (TS/SCI) - RMF & Cloud Security in Reston, VA, United States.
This opportunity is for the Senior ISSE (TS/SCI) - RMF & Cloud Security role at Cornerstone Defense LLC.
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