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Senior Linux Administrator
Job in
Montgomery, Montgomery County, Alabama, 36136, USA
Listed on 2026-10-13
Listing for:
Seneca Resources
Full Time
position Listed on 2026-10-13
Job specializations:
-
IT/Tech
Cybersecurity, Unix/Linux, Systems Administrator, Cloud Computing: Infrastructure & Operations
Job Description & How to Apply Below
- Administer, configure, troubleshoot, and maintain production and non-production RHEL and Ubuntu Linux virtual and physical servers.
- Maintain CIS-aligned security hardening
, including UFW, SSH, App Armor, PAM, auditd, and SSL/TLS configurations. - Support security compliance and remediation using Microsoft Defender for Cloud, Azure Policy, and Azure-native security tooling
. - Manage Ubuntu patching and lifecycle activities using Ubuntu Pro, Livepatch, Extended Security Maintenance (ESM), and APT
. - Develop and maintain automation using Bash and Power Shell
, including Cron jobs and scheduled processes. - Support Azure Dev Ops repositories, pipelines, source control, and CI/CD workflows for Linux environments.
- Support Docker workloads running on standalone Linux VMs.
- Integrate containerized workloads with Azure Key Vault for secrets management.
- Support Azure Container Registry (ACR), including image push/pull operations and vulnerability scanning.
- Maintain SSSD-based identity integration
, sudoers governance, and PAM configuration. - Manage LVM, XFS/EXT4 file systems, partitions, and dedicated mounts in accordance with CIS guidance.
- Perform system administration involving systemd, kernel tuning, auditd, and log rotation
. - Partner with cybersecurity teams to address audit findings, logging requirements, remediation activities, and overall security posture.
- Work independently as the senior Linux resource within a small, cross-functional IT and security team.
- 8+ years of hands-on Linux administration experience in enterprise or government environments.
- Strong experience with current Ubuntu Server LTS releases.
- Working knowledge of Microsoft Azure supporting Linux VMs, including networking, Managed Identity, and Azure Key Vault.
- Experience with Azure Dev Ops
, including repositories, pipelines, and CI/CD workflows. - Experience administering Docker on Linux
, including container secrets management. - Advanced Bash scripting skills and working knowledge of Power Shell
. - Experience with UFW, SSH hardening, App Armor, and SSL/TLS certificate management
. - Experience with systemd, kernel tuning/sysctl, PAM, auditd, and log rotation
. - Experience with SSSD and Linux identity/access management
. - Experience with LVM and XFS/EXT4 file system administration
. - Ability to independently troubleshoot and administer enterprise Linux environments.
Position Requirements
10+ Years
work experience
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