Senior Information Systems Security Officer - TS/SCI

Echelon Services, LLC in Charleston, SC, is seeking an Information Systems Security Officer (ISSO) to manage security posture across networked and standalone systems. You will develop and maintain documentation for ATO, SSP, and POAM, and ensure security controls meet regulatory requirements.

Qualified candidates bring 10+ years in information security, RMF experience, and DoD policy knowledge. TS/SCI with CI Polygraph is required; the role emphasizes risk management, continuous monitoring, and