Information Systems Security Engineer (ISSE) - Red Hat Enterprise Linux (RHEL)
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Before you apply
Salary$165k – $200k
LocationArlington, VA, US
Work modeon-site
Typefull-time
SenioritySenior
Experience5–12 yrs
DepartmentIT / Cyber Security / Network Systems
Company size1,001–5,000 people
PostedSep 15, 2026 · 1mo ago
Verified live3d ago
At a glanceSummarised by Seekless from the posting.
Active Top Secret/SCI with SAP eligibility
Bachelor’s degree in a STEM discipline with 11–12 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
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 (e.g., 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
Red Hat Enterprise Linux (RHEL)
Linux
High Performance Computing (HPC)
Splunk Enterprise
ACAS
SELinux
Rsyslog
Shorewall
Firewalld
Cisco
PostgreSQL
ESXI
Palo Alto
SQL
Oracle
Benefits
Health insurance
Paid leave
Retirement plans
Insurance programs
Education assistance
Sign on bonus
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.
Responsibilities
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
•
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.
Qualifications
•
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
Pay Transparency Statement
AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $165,000.00/Yr. - USD $200,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.
EEO Statement
EEO Race/Sex/Disability Status/Veteran Status