Senior RHEL Systems Engineer – DoD STIG Security

SAIC; Pearl City (HI); On-site; USD 120,000 - 160,000; Full time

Job summary

SAIC seeks a Red Hat Linux Systems Administrator at Ford Island, Hawaii to support USPACOM J76. Lead RHEL lifecycle, patching, and STIG compliance across enterprise Linux infrastructure for on‑prem environments and exercise networks.

Responsibilities include configuring and hardening RHEL, patch management with Satellite, and DoD vulnerability remediation using ACAS/Nessus. Collaborate with cross‑functional teams for core services and live/virtual exercises.

Qualifications

• Bachelor’s and nine (9)+ years of related experience; additional four (4) years of experience considered in lieu of degree.
• Extensive hands‑on experience installing, configuring, troubleshooting, and administering Red Hat Enterprise Linux (RHEL 8/9/10) in an enterprise environment.
• Proven experience executing Linux patching, package management, and lifecycle version upgrades utilizing Red Hat Satellite Server or local repository mirrors.
• Strong background in DoD security compliance, including applying and auditing DISA STIGs, and remediating ACAS vulnerability findings.
• Practical experience writing and running Ansible playbooks for automated configuration management and security hardening.
• Solid understanding of core networking and infrastructure services (DNS, DHCP, NTP, SSH, LDAP/Kerberos, NFS).
• Familiarity with virtualization platforms (e.g., VMware ESXi/vCenter) hosting Linux guests.

Responsibilities

• Install, configure, optimize, and administer Red Hat Enterprise Linux (RHEL) servers across enterprise, simulation, and exercise networks (including NDM and PTEN-S).
• Perform routine OS and application patching, kernel updates, and repository management using Red Hat Satellite and disconnected local mirror repositories.
• Harden systems against DISA STIGs using automated tools (Ansible, SCAP Compliance Checker), track findings, and remediate ACAS/Nessus vulnerabilities in response to DoD CTOs/IAVMs.
• Diagnose and resolve complex operating system, storage, network, and service-level issues to ensure maximum uptime across physical and virtualized enterprise infrastructure.
• Maintain and develop Ansible playbooks for baseline configuration management, STIG enforcement, and routine maintenance tasks.
• Provide systems and OS-level technical support to Modeling & Simulation (M&S) and C4I systems during live, virtual, and constructive exercise events.
• Monitor system health, performance, storage allocations, and availability of Linux infrastructure; implement proactive remediation.
• Author and update standard operating procedures (SOPs), system build documentation, and technical troubleshooting guides.
• Collaborate with cross-functional infrastructure and Windows systems engineers to support core services, shared storage, and directory integration.
• Perform other systems administration tasks as assigned.

Skills

RHEL administration

DoD security compliance

Troubleshooting complex OS

Networking fundamentals

VMware virtualization

Education

Bachelor’s degree in a related field

9+ years of related experience

Tools

Red Hat Satellite

ACAS

Nessus

SCAP Compliance Checker

Ansible

VMware ESXi/vCenter

Job description

SAIC seeks a Red Hat Linux Systems Administrator at Ford Island, Hawaii to support USPACOM J76. Lead RHEL lifecycle, patching, and STIG compliance across enterprise Linux infrastructure for on‑prem environments and exercise networks.

Responsibilities include configuring and hardening RHEL, patch management with Satellite, and DoD vulnerability remediation using ACAS/Nessus. Collaborate with cross‑functional teams for core services and live/virtual exercises.