Information Systems Security Engineer – Red Hat Enterprise Linux

AMERICAN SYSTEMS

. Design and implement enterprise-level security architectures for RHEL systems in a High Performance Computing SAP environment .

Posted 9/15/2026full-timeArlington • Virginia • United StatesSeniorLead💰 $165,000 - $200,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Expertise in designing and implementing enterprise-level security architectures for RHEL systems, with a strong focus on compliance and risk management frameworks such as RMF and JSIG. Proven ability to conduct security assessments, manage incident response, and collaborate with engineering teams to integrate security requirements into system designs.

Highest-signal resume keywords

Enterprise-Level Security Architecture DesignLinux Command-Line ProficiencyRMF/JSIG Authorization Artifacts DevelopmentDoD 8140 IAT Level III CertificationIncident Response Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

RHEL Systems SecuritySecurity AssessmentCommand-Line ValidationCompliance ScanningRemediation PlanningFirewall ConfigurationSecurity EngineeringDatabase SecurityVirtualized Environment SecurityLog Review

Soft Skills

CollaborationAnalytical ThinkingProblem SolvingCommunication

Tools & Technologies

Splunk EnterpriseACASSELinuxRsyslogShorewallFirewalldPalo AltoCiscoPostgreSQLESXi

Certifications & Qualifications

SecurityXCISSPCCNP SecurityCISAGCEDGCIHCCSP

Industry Keywords

High Performance ComputingJSIGNIST SP 800-53ICD 503DCID 6/3DoD Authorization PracticesPOA&M ManagementContinuous MonitoringSecurity Gaps AnalysisTechnical Security Oversight

Tech Stack

Tools & technologies

LinuxOraclePostgresSplunkSQL

About the role

Key responsibilities & impact

Design and implement enterprise-level security architectures for RHEL systems in a High Performance Computing SAP environment
Apply JSIG requirements across the entire environment using RHEL command-line and systems knowledge
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
Conduct command-line audits, compliance scans, log reviews, and control validation
Analyze scan results, identify security gaps, develop remediation plans, and execute them in production
Validate and implement host-based firewall and auditd configurations with system administrators
Manage and track POA&Ms through mitigation, remediation, or risk acceptance
Ensure 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 after 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

Requirements

What you’ll need

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, including RHEL, Ubuntu, Fedora, and CentOS
Strong background in RMF, ICD 503, NIST SP 800-53, DCID 6/3, or current DoD authorization practices
Working knowledge of the JSIG and its application to RMF authorization
Experience supporting Splunk Enterprise, ACAS, SELinux, Rsyslog, Shorewall, and Firewalld
Demonstrated security engineering experience across Linux, Cisco networking, databases such as SQL or Oracle, and virtualized environments

Benefits

Comp & perks

$10,000 sign-on bonus
Healthcare benefits
Paid leave
Retirement plans
Insurance programs
Education and training assistance
100% employee-owned company