Top Linux Systems Administrator Jobs

Provide mid- to top-tier Linux systems administration in a heterogeneous, high-interrupt environment. Responsibilities include managing junior administrators, resolving complex customer issues, executing system projects, maintaining security and patching, deploying software, managing backups, inventory, smart card authentication, storage, documentation, and procurement justifications. The role supports NOAA GFDL scientific and mission-driven operations and requires collaboration across project and user support activities.

Manage Linux servers and workstations, including installation, configuration, monitoring, security, backups, user accounts, hardware, software, and system availability. Provide network, help desk, and end-user support; automate administration with scripting and configuration management tools; troubleshoot complex infrastructure issues; document operations; and support asset deployment. The role requires substantial Linux systems administration experience and a current or obtainable U.S. security clearance.

The role involves designing, integrating, testing, and maintaining mission IT systems and supporting spacecraft operations. Responsibilities include requirement verification, user training, developing documentation, and ensuring system integration.

Administer and engineer large-scale Linux, Hadoop, and Accumulo distributed systems in a mission-critical cloud environment. Responsibilities include monitoring reliability, troubleshooting infrastructure, automating deployments, supporting Kubernetes workloads, managing Linux services and LDAP accounts, hardening systems, and contributing to architecture, incident response, and root cause analysis. The role requires after-hours on-call support and collaboration across infrastructure, networking, and security teams.

Maintain and monitor high-availability Linux environments supporting an Intelligence Community customer. Responsibilities include patching, troubleshooting network/server/application issues, managing tickets, applying STIG-based hardening, supporting IBM Db2, documenting system configurations, and collaborating with technical teams to improve secure operations. The role requires Linux administration, OpenShift, AWS, VMware, Security+ certification, and TS/SCI with polygraph eligibility.

Manage and administer RHEL production systems in a classified operational support network. Responsibilities include system maintenance, monitoring, patching, hardening, performance tuning, storage allocation, security compliance, automation with Ansible, and patch management through Red Hat Satellite. The role supports high availability and scalability across cloud, on-premises, and lab environments, collaborates with engineering teams, and mentors junior and mid-level administrators.

Administer and improve Linux infrastructure supporting electronic warfare systems, including bare-metal servers, virtual machines, workstations, storage, networking, authentication, and production environments. Configure RHEL and Ubuntu systems, virtualization platforms, automation, containers, monitoring, logging, and security hardening. Troubleshoot complex infrastructure issues, remediate vulnerabilities, perform patching and upgrades, and improve reliability, scalability, performance, and fault tolerance across development, test, and production environments.

Designs, develops, tests, implements, and maintains Linux-based systems supporting Air Force Intelligence Operations. Responsibilities include Linux administration, security hardening, patching, troubleshooting, automation, virtualization, cloud implementation, system monitoring, and customer-focused solution development across global multi-infrastructure environments.

Administer and maintain RHEL and Linux environments across classified and unclassified Navy networks. Responsibilities include system hardening, patching, vulnerability remediation, virtualization, automation, backup and disaster recovery, incident response, security compliance, documentation, and infrastructure lifecycle management. The role supports live mission operations at PMRF, including field and at-sea assignments, and requires collaboration with cybersecurity teams on authorization, audit readiness, and configuration management.

Administer mixed Linux and Windows enterprise systems, including MECM/SCCM, endpoint lifecycle management, OS deployment, patching, application distribution, Active Directory, virtualization, storage, backups, and identity services. Maintain security compliance with DISA STIGs, vulnerability scans, remediation, endpoint security tools, and POA&Ms. Support PKI, CAC authentication, logging, documentation, and collaboration with cybersecurity and infrastructure teams in an on-site DoD environment.

Administer and secure Windows and Linux systems across physical, virtualized, classified, and air-gapped environments. Responsibilities include Tier 2 troubleshooting, patching, vulnerability remediation, system hardening, compliance validation, account administration, automation, OS deployment, networking, virtualization, monitoring, backups, and documentation. The role requires active DoD Secret clearance, Security+ certification, and onsite work in Beavercreek, Ohio, with after-hours support and on-call participation.

Administer enterprise storage environments supporting HPC, virtual machine, and standalone systems. Configure storage devices, manage HSM software, support backups and archives, monitor performance, troubleshoot issues, and maintain tape, SAN, NAS, and storage hardware. The role also requires documentation, Information Assurance compliance, Unix/Linux administration, and support for DoD systems, including occasional after-hours emergency response.

Lead Linux systems administration for a secure Reagan Test Range operations center. Install, configure, monitor, troubleshoot, patch, back up, and lifecycle-manage physical and virtual RHEL servers. Administer Docker, virtualization, Ansible, Git, Windows systems, and security controls in a DoD environment. Mentor administrators, document technical processes, perform root-cause analysis, and support mission-critical projects, including occasional non-duty hours and weekends.

Administer and maintain enterprise Linux environments supporting testing, validation, and operational readiness. Configure operating systems and network components, troubleshoot Tier 1 and Tier 2 incidents, resolve hardware and OS issues, develop Bash automation scripts, monitor capacity and performance, optimize system reliability, and communicate operational status and resolutions to management and customers.

Maintain Linux and Windows servers, workstations, networks, and virtual and physical infrastructure. Provide onsite IT support and escalations, support DevOps Linux requirements, manage privileged access, and coordinate compliance with information assurance teams. The role requires administering Ubuntu systems, AWS environments, multiple networks, and Risk Management Framework requirements while collaborating with vendors, customers, management, and development teams.

Maintain Linux and Windows servers, workstations, networks, and virtual and physical infrastructure. Provide onsite IT support and escalations, support DevOps Linux requirements, administer privileged access, and manage AWS environments. Coordinate with information assurance teams on compliance and Risk Management Framework requirements. Troubleshoot issues, work with vendors and customers, and adapt infrastructure to evolving organizational needs.

Administer and sustain large-scale Linux clusters, including software installation, configuration, monitoring, troubleshooting, security compliance, and performance enhancements. Manage compute, network, memory, and storage components; configure VMware virtualization environments; automate infrastructure using SaltStack and Ansible; support containerization; and use tools such as Red Hat Satellite, Splunk, HPE OneView, and Nagios. The role requires an active TS/SCI with polygraph, Security+, extensive systems administration experience, and a technical bachelor’s degree or equivalent experience.

Administers Linux servers and Proxmox VE infrastructure, including clusters, virtual machines, containers, storage, backups, monitoring, security, and disaster recovery. Automates administration with scripting and configuration management, troubleshoots infrastructure issues, maintains documentation, supports critical incidents, and collaborates with IT teams in an onsite manufacturing environment. Participates in on-call coverage and planned maintenance.

Manage and support classified Red Hat Linux infrastructure onsite, including servers, storage, file systems, access, backups, software deployments, workstations, virtualization, and performance tuning. Troubleshoot complex hardware and operating system issues, implement security hardening, collaborate with cybersecurity teams, document technical solutions, and support disaster recovery. An active DoD Secret clearance and U.S. citizenship are required, along with DoD certification eligibility.

Manage and monitor Linux-based IT infrastructure, servers, networks, and cloud environments. Build and maintain CI/CD pipelines, troubleshoot system issues, improve availability and performance, and collaborate with development teams on deployment strategies. Automate administrative tasks using scripting, Ansible, and Terraform. Maintain system documentation, implement security controls, and stay current with DevOps practices. The role requires extensive systems administration experience, a technical bachelor's degree or equivalent experience, and an active Top Secret/SCI clearance with favorable polygraph.

Serve as a Linux Systems Administrator SME supporting a mission-critical environment. Install, configure, secure, patch, and document Linux systems and virtualized/cloud environments. Diagnose networking issues, collaborate with developers and ISSO, automate tasks with scripts/tools, and lead system integration and maintenance activities.

Assist project teams with technical issues during project initiation and planning; ensure continued operation of Linux systems for wifi services.

Administer, maintain, monitor, and troubleshoot Linux servers. Deploy and migrate systems on AWS, architect cloud solutions, test new configurations, manage Apache or NGINX environments, troubleshoot networking issues, and implement load-balancing and monitoring solutions. Preferred experience includes orchestration tools, Jenkins, scripting languages, and RHCE certification.

The UNIX/Linux Systems Administrator is responsible for installing, configuring, and maintaining Linux systems, ensuring data integrity, and managing software solutions, among other responsibilities in a Systems Administration team.

Provide senior Linux systems administration and engineering support in a Kubernetes-based Intelligence Community mission environment. Administer CentOS/RHEL systems, Kubernetes tooling, containers, and Bash-based workflows while supporting software productization. The role requires an active TS/SCI clearance with polygraph, Security+ certification, and at least 10 years of Linux administration or systems engineering experience. Desired qualifications include Red Hat certification, Python, Ansible, Salt, VMware, DevOps, classified networking, encryption, storage, authentication, and physical server administration experience.