Linux System Administrator

Position Details

• Position: Senior Linux System Administrator
• Location: On-Site – Montgomery, AL
• Duration: 12 Months, with possible extension
• Work Environment: Enterprise/Government IT
• Background Check: State and federal background checks required

Position Overview

The Senior Linux System Administrator will be responsible for operating, maintaining, securing, and automating Red Hat, Ubuntu, and other Linux systems across on-premises and Azure environments, including Azure Commercial/GCC and Azure Government.

The ideal candidate will have strong Linux administration experience combined with hands-on knowledge of Azure, Azure DevOps, Docker, security hardening, automation, and identity management.

Key Responsibilities

• Administer, configure, troubleshoot, and maintain production and non-production RHEL and Ubuntu servers and VMs.
• Perform CIS-aligned Linux security hardening and remediation.
• Work with Microsoft Defender for Cloud and Azure Policy for security posture and compliance.
• Manage Ubuntu patching using Ubuntu Pro, Livepatch, ESM, and APT.
• Develop and maintain automation using Bash and PowerShell, including Cron-based scheduled jobs.
• Support Azure DevOps repositories, pipelines, CI/CD workflows, and Linux-based deployments.
• Support Docker workloads running on standalone Linux VMs.
• Integrate container workloads with Azure Key Vault and Azure Container Registry (ACR).
• Manage SSSD identity integration, sudoers governance, and PAM configuration.
• Administer LVM, XFS/EXT4 filesystems, partitions, and dedicated mounts such as /var, /tmp, and /var/log/audit.
• Support audit findings, auditd logging, compliance activities, and cybersecurity initiatives.
• Troubleshoot and optimize Linux systems while maintaining security and availability.

Required Qualifications

• 8+ years of hands-on Linux system administration experience in enterprise or government environments.
• Strong expertise with current Ubuntu Server LTS releases and RHEL.
• Experience administering Linux VMs in Microsoft Azure.
• Knowledge of Azure networking, managed identities, and Key Vault.
• Hands-on experience with Azure DevOps, repositories, pipelines, and CI/CD.
• Experience with Docker on Linux, including container secrets management.
• Advanced Bash scripting and working knowledge of PowerShell.
• Strong knowledge of UFW, SSH hardening, AppArmor, and SSL/TLS certificates.
• Experience with systemd, /etc/sysctl.conf, PAM, auditd, and log rotation.
• Ability to work independently within a small, cross-functional IT/security team.

Preferred Qualifications

• Ubuntu/Canonical certifications, CISSP, or CompTIA Security+.
• AZ-900 and/or AZ-104 certification.
• Healthcare or public-sector IT experience.
• Familiarity with MARS-E, HIPAA technical safeguards, or CMS security requirements.
• Experience supporting development infrastructure with rapidly changing workloads.