Linux System Administrator — DoD Cyber Ops (TS/SCI)

G6 Cyber Solutions; San Antonio (TX); On-site; USD 90,000 - 140,000; Full time

Job summary

G6 Cyber Solutions is seeking a Linux System Administrator to support Air Force operations at Lackland AFB in San Antonio, TX. The role emphasizes securing, hardening, and maintaining a classified environment with DoW standards.

You will manage Windows and Linux systems, perform patching, automate tasks with Ansible, and maintain SOPs while ensuring compliance and rapid incident response.

Qualifications

• Experience in Windows and Linux/RHEL system administration (install, configure, optimize).
• Manage hardware, software, and utilities for installation, modification, troubleshooting, maintenance, and upgrades.
• Experience with security assessments, vulnerability remediation, and applying STIGs using automated tools.
• Experience with user lifecycle management and account administration.
• Experience executing system patches within DoW timelines (3 business days for critical, 10 for routine).
• Experience with backups, disaster recovery, and restoring services within SLA timelines.
• CLI proficiency on Linux and Windows environments.
• Develop and maintain SOPs for administrative processes.

Responsibilities

• Conduct regular security assessments using ACAS scans to identify and remediate vulnerabilities.
• Enforce security postures and apply STIGs across networks using GPOs.
• Maintain automated security compliance scanning to ensure adherence to baselines.
• Track and monitor patching and STIG applications to maintain health and compliance.
• Manage system infrastructure including configuration, installation, administration, and optimization.
• Develop, deploy, and maintain Ansible roles and playbooks for automation of backups, patching, and tasks.
• Execute scheduled patches, monthly updates, and routine maintenance across RHEL and Windows servers.
• Configure and verify full system backups and disaster recovery solutions.

Skills

Linux administration

Windows administration

STIG compliance

Vulnerability remediation

Patching processes

SOP development

PowerShell scripting

Tools

Ansible

SCAP/ACAS

RH IdM

NVIDIA BCM

Job description

G6 Cyber Solutions is seeking a Linux System Administrator to support Air Force operations at Lackland AFB in San Antonio, TX. The role emphasizes securing, hardening, and maintaining a classified environment with DoW standards.

You will manage Windows and Linux systems, perform patching, automate tasks with Ansible, and maintain SOPs while ensuring compliance and rapid incident response.