Information Systems Security Officer (ISSO) – TS Eligible

Astrion; Columbia (MD); On-site; USD 110,000 - 140,000; Full time

Job summary

Astrion is seeking an Information Systems Security Officer (ISSO) to support the ISSM by verifying security controls, conducting continuous monitoring, and ensuring classified systems operate per SSPs and local procedures. Located in Columbia, MD, this role emphasizes security oversight for government clients.

The ISSO will coordinate audits, maintain authorization artifacts, and ensure users receive required briefings and access authorizations, while supporting incident response and continuous

Qualifications

• Bachelor’s degree with 2-4 years of experience.
• Experience in supporting U.S. Government clients.
• Be able to apply knowledge of IA policy, procedures, and workforce structure to develop, implement and maintain a secure network environment.
• A CAP, CISM, CySA, or CISSP certification is required; U.S. citizenship with TS eligibility.

Responsibilities

• Information System Security Officer - support day-to-day security oversight of classified information systems and ensure users, systems, and processes remain compliant with NISPOM Rule, DCSA/CSA guidance, approved security documentation, and local procedures.
• Ensure compliance with the approved System Security Plan (SSP), security policies, procedures, and system-specific requirements.
• Support the ISSM in maintaining the classified information system security program.
• Coordinate and conduct system self-inspections and document results.
• Track, validate, and report corrective actions to the ISSM.
• Support continuous monitoring activities, including review of audit logs, account activity, configuration changes, vulnerability status, and system security posture.
• Assist with configuration management and identify security-relevant changes that may require ISSM review or reauthorization.
• Ensure users receive required system security briefings, training, user agreements, and access authorizations before system access is granted.
• Monitor user compliance with classified system rules, including password/authentication protection, need-to-know, media handling, removable media restrictions, and reporting requirements.
• Support incident response for data spills, suspected compromises, audit anomalies, unauthorized activity, or other reportable security concerns
• Assist with maintaining authorization documentation, including SSPs, POA&Ms, risk assessments, security assessment results, contingency plans, configuration records, and authorization artifacts.
• Coordinate with the ISSM, FSO/AFSO, Insider Threat Program, IT, program leadership, and Government security representatives as required.
• Ensure classified systems are operated only within their approved authorization boundary, classification level, caveats, and accredited configuration

Skills

IA policy knowledge

Security controls implementation

Continuous monitoring

Self-inspections

User access requirements training

Top Secret eligibility

CAP/CISM/CySA/CISSP

Education

Bachelor’s degree

Tools

Word

Excel

PowerPoint

WASSP

MBSA

Job description

Astrion is seeking an Information Systems Security Officer (ISSO) to support the ISSM by verifying security controls, conducting continuous monitoring, and ensuring classified systems operate per SSPs and local procedures. Located in Columbia, MD, this role emphasizes security oversight for government clients.

The ISSO will coordinate audits, maintain authorization artifacts, and ensure users receive required briefings and access authorizations, while supporting incident response and continuous