Information Systems Security Engineer / ISSE (HPC)

AMERICAN SYSTEMS, a 100% employee-owned federal contractor, is seeking a highly experienced Information Systems Security Engineer (ISSE) to support RHEL and Windows systems in a High Performance Computing (HPC) environment in Arlington, VA .

This role includes a $10,000 sign-on bonus in addition to a generous compensation package.

As an Information Systems Security Engineer (ISSE) at AMERICAN SYSTEMS, you will:

• Design and implement enterprise-level security architectures for RHEL systems in a High Performance Computing (HPC) SAP environment
• Apply JSIG requirements to system authorization, control implementation, and documentation
• Manually develop RMF/JSIG authorization artifacts , including SSPs , control narratives , POA&Ms, and supporting evidence
• Perform hands-on security assessments on Linux and Windows systems , including command-line audits , compliance scans, log review, and control validation
• Analyze scan results, identify security gaps, and support remediation planning and execution
• Validate and implement host-based firewall and security configurations in coordination with system administrators
• Manage and track POA&Ms through mitigation, remediation, or risk acceptance
• Ensure system compliance through continuous monitoring of controls, procedures, and documentation
• Identify security deficiencies and provide actionable remediation recommendations
• Support system recovery and security oversight following outages or incidents
• Participate in change management activities, assessing security impacts to SAP systems
• Support security investigations, incident response , and remediation activities
• Collaborate with engineering teams to integrate security requirements into system design and production releases

#hotjobs

• Active Top Secret/SCI with SAP eligibility
• Bachelor’s degree in a STEM discipline with 11–12 years of relevant experience, or Master’s degree with 8–10 years of relevant experience
• Master’s degree with 8–10 years of relevant experience
• Minimum 5 years of experience designing and implementing enterprise-scale security solutions with hands-on security assessment experience across Linux systems , including command-line validation
• DoD 8140 IAT Level III –equivalent certification (e.g., SecurityX , CISSP , CCNP Security, CISA, GCED, GCIH, or CCSP)