Senior Information Systems Security Officer – TS/SCI

Echelon Services; Hanahan (SC); On-site; USD 250,000 - 300,000; Full time

Job summary

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

Qualifications

• Minimum of 10 years of information security experience.
• Experience with RMF and DoD policies required.
• Knowledge of Windows/Linux/Unix, networks, and databases.
• IAT Level II or DoD 8140 certifications preferred.

Responsibilities

• Develop, implement, and maintain system documentation for authorization, security management, and continuous monitoring (ATO, SSP, POAM).
• Ensure SSP reflects system architecture, controls, and procedures.
• Conduct risk and vulnerability assessments to identify weaknesses and mitigation strategies.
• Coordinate with CSSP and stakeholders during incident response activities.

Skills

RMF

Security administration

Vulnerability assessments

SIEM

Incident response

Education

BS degree in Computer Science or Information Security

Tools

SCAP Compliance Checker

ACAS Scans

Splunk

Job description

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