Linux System Administrator
About The Position
G6 Cyber Solutions (G6CS) is seeking a motivated, mission-oriented Linux System Administrator to support Air Force operations at Lackland AFB in San Antonio, Texas. This on-site role manages and secures internal systems, ensures compliance with Department of War standards, and optimizes network infrastructure in a classified environment in support of mission-critical military operations. The role requires U.S. citizenship and TS/SCI eligibility. The administrator works across RHEL/Linux and Windows server environments, handling system configuration, installation, administration, optimization, maintenance, patching, security compliance, user access, backups, disaster recovery, virtualization, networking, and cluster management. The position also develops and maintains automation, operational documentation, and provides Tier II/III technical support.
Requirements
- Experience in system administration across Windows and Linux/RHEL environments, including configuration, installation, and optimization.
- Ability to manage hardware, software, and utilities for installation, modification, troubleshooting, maintenance, and upgrades.
- Experience with security assessments, vulnerability remediation, and applying STIGs using automated compliance tools.
- Experience with user lifecycle management and account administration.
- Experience executing system patches within DoW timelines: 3 business days for critical patches and 10 business days for routine patches.
- Experience with system backups, disaster recovery solutions, and restoring critical services within SLA timelines.
- Understanding of Linux and Windows command-line interfaces (CLI).
- Experience developing and maintaining Standard Operating Procedures (SOPs).
- U.S. citizenship.
- TS/SCI eligibility.
- Minimum certification: CompTIA Security+.
Nice To Haves
- Experience in Department of War intelligence communities.
- Experience with security standards defined by NSA, NIST, and/or USCYBERCOM.
- Experience developing automated scripts using PowerShell or Bash and using automation platforms such as Ansible.
- Experience with SCAP, ACAS, SIEM, and HIDS/NIDS toolsets.
- Experience with virtualization platforms such as Red Hat Virtualization or OpenShift Virtualization.
- Experience with Red Hat Identity Management (IdM) or similar centralized authentication systems.
- Experience with disaster recovery solutions such as ReaR (Relax-and-Recover).
- Experience with High-Performance Computing (HPC) cluster management tools.
- Red Hat Certified System Administrator (RHCSA).
- Additional certifications in system administration or cybersecurity.
Responsibilities
- Conduct regular ACAS security assessments to identify, review, and remediate vulnerabilities.
- Enforce security postures and apply STIGs across networks using GPOs.
- Maintain automated security compliance scanning, such as SCAP cron jobs, to ensure adherence to security baselines.
- Track and monitor patching and STIG applications to maintain network health and compliance.
- Manage system infrastructure, including configuration, installation, administration, and optimization.
- Develop, deploy, and maintain Ansible roles and playbooks to automate backups, patching, repository configurations, and recurring tasks.
- Execute scheduled patches, monthly updates, and routine maintenance across RHEL and Windows server environments.
- Configure, execute, and verify full system backups and disaster recovery solutions, such as ReaR.
- Administer user lifecycle management, including auditing stale accounts and automating user deactivation via PowerShell.
- Manage service account authentications and privilege escalation rules.
- Administer centralized authentication and authorization using Red Hat Identity Management (IdM).
- Manage virtualization infrastructure using Red Hat Virtualization (RHV) or Red Hat OpenShift Virtualization.
- Manage networking switches, routers, and firewalls in DoD-compliant environments.
- Manage HPC and AI clusters using NVIDIA Base Command Manager (BCM).
- Provision and manage software installations across network endpoints.
- Author and maintain SOPs for administrative processes, vault management, certificate updates, and disaster recovery.
- Document system infrastructure for users, support personnel, developers, IA personnel, and accreditors.
- Provide Tier II/III technical support for user issues and system troubleshooting.
Stand Out From the Crowd
Upload your resume and get instant feedback on how well it matches this job.
What This Job Offers
Job Type
Full-time
Education Level
No Education Listed
