Posted today
Secret
Mid Level Career (5+ yrs experience)
$90,000 - $115,000
25%
IT - Security
Role: RHEL System Administrator – ATO / Security Hardening Support
Duration: 9 Months
Location: Remote with 25% travel to Oklahoma City, OK; Ogden, UT; Mechanicsburg, PA; Montgomery, AL
SUMMARY
We are seeking a hands-on Red Hat Enterprise Linux (RHEL) System Administrator with strong experience in system hardening, STIG implementation, and vulnerability remediation. This role focuses primarily on technical Linux work, with secondary responsibilities supporting ATO/RMF compliance documentation. Candidates must be comfortable securing RHEL systems in DoD environments while working closely with cybersecurity and PM teams.
PRIMARY RESPONSIBILITIES (Hands-On RHEL Focus)
Perform daily RHEL system administration including configuration, patching, troubleshooting, and performance optimization.
Execute RHEL system hardening to DoD standards, including:
Applying and validating DISA STIGs
Running and analyzing OpenSCAP/Tenable scans
Remediating findings directly on the systems
Update and maintain secure baselines, OS configurations, and system-level security settings.
Validate, update, and clean up STIG Checklists (CKLs) with accurate comments, evidence, and remediation notes.
Analyze Tenable/Nessus scan data, identify root causes, and implement technical fixes.
Troubleshoot and resolve security control noncompliance at the OS level.
SECONDARY RESPONSIBILITIES (ATO / RMF Support)
Contribute technical inputs to SSPs, POA&Ms, RARs, and other ATO documentation.
Provide evidence, screenshots, and system configuration details to support cybersecurity assessments.
Assist the PM with data and security artifacts for customer-facing reporting.
Support Zero Trust, IA control validation, and Red/Blue control documentation as needed.
Work within DoD Risk Management Framework (RMF) processes.
REQUIRED SKILLS
Strong hands-on experience with RHEL 7/8/9 system administration.
Proven ability to apply and remediate DISA STIGs on Linux systems.
Experience reviewing and updating CKLs.
Familiarity with Tenable/Nessus findings and vulnerability remediation.
Working knowledge of RMF, DoD IA controls, and ATO packages.
Ability to communicate clearly with PMs, cyber teams, and technical stakeholders.
KEY SKILLS (Preferred but Not Required)
AWS Public Cloud networking exposure
Data center networking with Aruba CX switches
Cybersecurity risk assessment
Information security experience in U.S. Public Sector / DoD environments
Duration: 9 Months
Location: Remote with 25% travel to Oklahoma City, OK; Ogden, UT; Mechanicsburg, PA; Montgomery, AL
SUMMARY
We are seeking a hands-on Red Hat Enterprise Linux (RHEL) System Administrator with strong experience in system hardening, STIG implementation, and vulnerability remediation. This role focuses primarily on technical Linux work, with secondary responsibilities supporting ATO/RMF compliance documentation. Candidates must be comfortable securing RHEL systems in DoD environments while working closely with cybersecurity and PM teams.
PRIMARY RESPONSIBILITIES (Hands-On RHEL Focus)
Perform daily RHEL system administration including configuration, patching, troubleshooting, and performance optimization.
Execute RHEL system hardening to DoD standards, including:
Applying and validating DISA STIGs
Running and analyzing OpenSCAP/Tenable scans
Remediating findings directly on the systems
Update and maintain secure baselines, OS configurations, and system-level security settings.
Validate, update, and clean up STIG Checklists (CKLs) with accurate comments, evidence, and remediation notes.
Analyze Tenable/Nessus scan data, identify root causes, and implement technical fixes.
Troubleshoot and resolve security control noncompliance at the OS level.
SECONDARY RESPONSIBILITIES (ATO / RMF Support)
Contribute technical inputs to SSPs, POA&Ms, RARs, and other ATO documentation.
Provide evidence, screenshots, and system configuration details to support cybersecurity assessments.
Assist the PM with data and security artifacts for customer-facing reporting.
Support Zero Trust, IA control validation, and Red/Blue control documentation as needed.
Work within DoD Risk Management Framework (RMF) processes.
REQUIRED SKILLS
Strong hands-on experience with RHEL 7/8/9 system administration.
Proven ability to apply and remediate DISA STIGs on Linux systems.
Experience reviewing and updating CKLs.
Familiarity with Tenable/Nessus findings and vulnerability remediation.
Working knowledge of RMF, DoD IA controls, and ATO packages.
Ability to communicate clearly with PMs, cyber teams, and technical stakeholders.
KEY SKILLS (Preferred but Not Required)
AWS Public Cloud networking exposure
Data center networking with Aruba CX switches
Cybersecurity risk assessment
Information security experience in U.S. Public Sector / DoD environments
group id: 10105424
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