AMERICAN SYSTEMS
Jobs
Information Systems Security Engineer (ISSE) - Red Hat Enterprise Linux (RHEL)
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The Role
Designs and secures RHEL systems in an HPC SAP environment. Responsibilities include applying JSIG and RMF requirements, developing authorization artifacts, conducting command-line security assessments, validating configurations, managing POA&Ms, performing continuous monitoring, executing remediation plans, supporting recovery, and leading incident response. The role collaborates with engineering and system administration teams to integrate security controls into system designs and production releases.
Summary Generated by Built In
Overview
AMERICAN SYSTEMS, a 100% employee-owned federal contractor, is seeking a highly experienced Information Systems Security Engineer (ISSE) to support Red Hate Enterprise Linux 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.
ResponsibilitiesAs 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
- Utilize RHEL command-line and systems knowledge to apply JSIG requirements across the entire environment.
- Manually develop RMF/JSIG authorization artifacts, including SSPs, control narratives, POA&Ms, and supporting evidence
- Perform hands-on security assessments on Linux, Palo Alto, Cisco, PostgreSQL and ESXI systems including command-line audits, compliance scans, log review, and control validation
- Analyze scan results, identify security gaps, develop remediation plans and execute these plans in a production environment.
- Validate and implement host-based firewall and auditd 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 lead technical security oversight following outages or incidents
- Lead incident response investigation, mitigation, reporting and remediation.
- Collaborate with engineering teams to integrate security requirements into system design and production releases.
- 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
- Minimum 5 years of experience designing and implementing enterprise-scale security solutions with hands-on security assessment experience, including command-line validation, across Linux systems.
- DoD 8140 IAT Level III–equivalent certification (e.g., SecurityX, CISSP, CCNP Security, CISA, GCED, GCIH, or CCSP)
- Working experience in Linux command-line (eg. RHEL, Ubuntu, Fedora, CentOS)
- Strong background in RMF, ICD 503, NIST SP 800-53, DCID 6/3, or current DoW authorization practices
- Working knowledge of the JSIG and its application to RMF authorization
- Experience supporting security tools such as Splunk Enterprise, ACAS, SELinux, Rsyslog, Shorewall, Firewalld
- Demonstrated security engineering experience across Linux, Cisco networking, databases (SQL or Oracle), and virtualized environments
Skills Required
- Active Top Secret/SCI clearance 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
- At least 5 years designing and implementing enterprise-scale security solutions with hands-on Linux security assessment and command-line validation experience
- DoD 8140 IAT Level III-equivalent certification, such as SecurityX, CISSP, CCNP Security, CISA, GCED, GCIH, or CCSP
- Working experience with Linux command-line environments, including RHEL, Ubuntu, Fedora, or CentOS
- Strong background in RMF, ICD 503, NIST SP 800-53, DCID 6/3, or current DoD authorization practices
- Working knowledge of JSIG and its application to RMF authorization
- Experience supporting Splunk Enterprise, ACAS, SELinux, Rsyslog, Shorewall, or Firewalld
- Security engineering experience across Linux, Cisco networking, SQL or Oracle databases, and virtualized environments
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The Company
What We Do
AMERICAN SYSTEMS is an employee-owned government services contractor that delivers professional, technical, information technology, engineering, analysis, testing, evaluation, and training solutions for complex national-priority programs. Based in McLean, Virginia, the company supports federal customers—particularly defense and other Department of Defense missions—with mission-essential and information engineering, digital engineering, systems integration, cybersecurity, cloud, data, and lifecycle IT services across critical public-sector environments.
