Linux Administrator / Systems Administrator (NSWC IHD Code 104)

EHS TECHNOLOGIES CORPORATION • Indian Head, MD

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About The Position

We are seeking an experienced and motivated Senior Linux Administrator to handle day-to-day administration, configuration management, automation, and performance optimization for a Red Hat and Ubuntu-based Linux cluster supporting servers and workstations. The role works closely with end users and core RDTE staff to maintain high cluster performance, robust infrastructure security, and seamless deployment of containerized and cloud environments.

The administrator installs, configures, maintains, and monitors software applications, operating systems, development tools, hardware, and storage systems across RHEL and Ubuntu servers and workstations. The position also provides secondary support for core and end-user systems, manages configuration and automation, supports cloud and container infrastructure, and maintains networked storage and security controls. The role includes troubleshooting cluster performance and submitted job execution, as well as creating and maintaining technical documentation.

Requirements

• 6 to 10 years of relevant professional experience without a degree.
• DoD Secret Clearance or above.
• DoD 8570/5239 IAT Level 3 Certification, such as Security X or CISSP.
• Linux+ Certification.
• Red Hat Certified System Administrator (RHCSA).
• Advanced knowledge of Linux system administration and enterprise systems, with strong troubleshooting and problem-solving skills.
• Proven experience managing Red Hat-based clusters, storage, and networking.
• Strong working knowledge of configuration management tools, particularly Ansible.
• Hands-on experience deploying and supporting cloud infrastructure, DevOps pipelines, and container orchestration, including Docker and Kubernetes.
• Practical understanding of networking principles, protocols, and security practices.
• Familiarity with storage protocols including NFS, SCSI, SAN/NAS, and SMB/CIFS.
• Working knowledge of DISA STIG implementation and system hardening.
• Ability to work effectively independently and as part of a collaborative team.

Responsibilities

• Install, configure, maintain, and monitor software applications, operating systems, development tools, hardware, and storage systems across RHEL and Ubuntu servers and workstations.
• Provide secondary support for core and end-user systems as needed.
• Create custom scripts using Bash, Python, PowerShell, and other languages to streamline administrative tasks and operational management.
• Use Ansible and other enterprise tools to manage and automate configuration requirements across RHEL and Ubuntu systems.
• Deploy, support, and scale cloud infrastructure, container environments, and orchestration platforms, including Kubernetes and Docker, within a DevOps framework.
• Manage networking technologies, including IP addressing, VLANs, trunks, LAG, InfiniBand, switch configuration, and security practices.
• Configure and maintain networked storage solutions such as NFS, SCSI, SAN/NAS, and SMB/CIFS.
• Apply and maintain security postures using DISA STIGs for Red Hat and Ubuntu environments.
• Partner with end users and core RDTE staff to troubleshoot cluster performance issues and submitted job execution.
• Create and maintain technical documentation, including system configurations, SOPs, end-user guides, and troubleshooting documentation.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed