Senior ISSE (TS/SCI) for HPC Security — RHEL/JSIG

AMERICAN SYSTEMS; Arlington (VA); On-site; USD 165,000 - 200,000; Full time

Benefits offered by this job

$10,000 sign-on bonus

Job summary

AMERICAN SYSTEMS, a 100% employee-owned federal contractor, seeks an experienced Information Systems Security Engineer (ISSE) to secure Red Hat Enterprise Linux in a High Performance Computing environment in Arlington, VA. A $10,000 sign-on bonus accompanies a competitive compensation package.

The role requires hands-on RMF/JSIG authorization artifacts, incident response leadership, and collaboration with engineering teams to integrate security throughout system design and production releases.

Qualifications

• Bachelor's degree in a STEM discipline
• 11-12 years of relevant experience; Master’s with 8-10 years are acceptable
• Minimum 5 years designing and implementing enterprise-scale security solutions with hands-on assessment across Linux systems
• DoD 8140 IAT Level III-equivalent certification (SecurityX, CISSP, CCNP Security, CISA, GCED, GCIH, or CCSP)
• Working knowledge of Linux command-line (RHEL, Ubuntu, Fedora, CentOS)
• Strong RMF, ICD 503, NIST SP 800-53, DCID 6/3 or DoW authorization familiarity
• Working knowledge of JSIG and RMF authorization
• Experience with security tools: Splunk Enterprise, ACAS, SELinux, Rsyslog, Shorewall, Firewalld
• Security engineering across Linux, Cisco networking, databases, and virtualization environments

Responsibilities

• Design and implement security architectures for RHEL systems in an HPC SAP environment
• Apply JSIG requirements across the environment using command-line tools
• Develop RMF/JSIG authorization artifacts (SSPs, control narratives, POA&Ms)
• Conduct hands-on security assessments on Linux, network devices, databases, and virtualization platforms
• Analyze scan results and develop remediation plans
• Configure host-based firewall and auditd with system administrators
• Manage and track POA&Ms through remediation or risk acceptance
• Ensure continuous monitoring of controls and documentation
• Identify security deficiencies and provide remediation recommendations
• Support system recovery and lead security oversight after outages or incidents
• Lead incident response investigations and remediation
• Collaborate with engineering to integrate security into system design and releases

Skills

Command-line proficiency

RMF/JSIG understanding

Incident response leadership

Security architecture design

DoD 8140 IAT III knowledge

Linux systems knowledge

Collaboration with engineering teams

Education

Bachelor's degree in STEM

Master's degree in STEM

Tools

Splunk Enterprise

ACAS

SELinux

Rsyslog

Shorewall

Firewalld

Job description

AMERICAN SYSTEMS, a 100% employee-owned federal contractor, seeks an experienced Information Systems Security Engineer (ISSE) to secure Red Hat Enterprise Linux in a High Performance Computing environment in Arlington, VA. A $10,000 sign-on bonus accompanies a competitive compensation package.

The role requires hands-on RMF/JSIG authorization artifacts, incident response leadership, and collaboration with engineering teams to integrate security throughout system design and production releases.