Top Linux Systems Administrator Jobs

Manage and support Red Hat Linux systems on VMware, configure Puppet for deployments, monitor performance, collaborate with infrastructure teams, ensure security/compliance, assist testing and disaster recovery, and automate administrative tasks.

Provide Linux and Windows systems administration for classified DoD programs, implement secure infrastructure (Ansible, LDAP/AD, VMware, storage, backups), collaborate with cybersecurity, troubleshoot complex issues, meet DoD certification and clearance requirements, and support 24x7 operations with occasional travel.

Lead and perform expert Red Hat Linux systems administration for DoD supercomputing centers. Manage configuration, installation, upgrades, performance tuning, acceptance testing, and compliance. Administer Red Hat Satellite, automate tasks with Ansible, maintain documentation, and provide technical leadership to a team of Linux administrators supporting mission-critical systems.

Architect, administer, and improve a secure, highly available enterprise Linux environment. Support developers and mission users by managing physical and virtual infrastructure, network administration, system hardening, vulnerability remediation, RMF/SSP compliance, patching, backups/disaster recovery, and NGINX deployments while driving DevOps and infrastructure modernization.

Administer, configure, and optimize Red Hat/CentOS Linux server environments supporting USCENTCOM mission systems. Responsibilities include service management (Apache, Nginx, DNS, DHCP, LDAP), performance monitoring, security hardening and patching per DoD policies, SSL/TLS certificate lifecycle, troubleshooting complex issues, documentation, reporting, upgrades/migrations, cross-team collaboration, and mentoring junior administrators. Requires TS/SCI clearance and US citizenship.

Manage and maintain Linux-based systems, ensuring security and stability, performing updates, troubleshooting issues, and automating tasks.

The Linux Systems Administrator is responsible for complex system analysis, maintenance, installation, and troubleshooting of enterprise servers and storage solutions. Mentoring is required for this role with significant experience in administration and support.

The Senior Linux Systems Administrator will design, install, configure, and maintain servers, troubleshoot problems, and support large-scale applications while focusing on system integration and stability.

The role involves Unix/Linux System Administration, managing Oracle CRS, providing user support, and contributing to incident, problem, and change management processes.

Manage, provision, and maintain Red Hat Enterprise Linux servers using Puppet automation. Perform monitoring, patching (Satellite/YUM), troubleshooting, IaC scripting, version control, and collaborate with teams to ensure 24/7 system reliability and documentation. Provide onsite support at Langley AFB and train teammates.

Administer, secure, and maintain Windows and Linux systems in physical, virtual, and air-gapped classified environments. Perform Tier 2 incident resolution, patching, vulnerability remediation, system hardening (DISA STIGs, SCAP, NIST 800-53), automation (PowerShell, Bash, Ansible), imaging/OS deployment, AD/DNS/DHCP administration, Layer 2 networking, backups, monitoring, and on-call support to ensure availability and compliance.

The Systems Administrator will manage Linux and Windows servers, perform installations and configurations, and provide support for large-scale software development and operations.

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

Provide Level 2 Linux/Unix systems administration in a 24×7 NOC: troubleshoot OS/service/connectivity issues, perform patching/reimaging, manage packages, own incident remediation, monitor systems, produce reports, maintain documentation, and train Level 1 analysts.

Operate and maintain Linux/Unix development, test, and production servers: patching, re-imaging, package management, monitoring, troubleshooting, and incident remediation. Own Level 2 tickets, perform root cause analysis, produce operational reports, maintain documentation and runbooks, and train Level 1 analysts. Support 24×7 rotating shifts and comply with export-control authorizations.

Administer and maintain Linux/Unix development, test, and production servers including imaging, patching, package management, and shell-level maintenance. Monitor systems, troubleshoot complex OS/service/connectivity issues, own Level 2 incidents through resolution and root-cause analysis, produce operational reports, maintain documentation/configuration data, create runbooks, and train Level 1 analysts. Support 24x7 operations across rotating shifts and ensure compliance with export-control and authorization requirements.

Provide advanced Linux/Unix administration in a 24×7 NOC: troubleshoot OS/service/connectivity issues, perform re-imaging, patching, package management (yum/apt/rpm), monitoring, incident remediation, runbook creation, documentation, and train Level 1 analysts. Maintain compliance and operational reporting across development, test,and production servers; support rotating shifts.

Administer, maintain, and secure enterprise IT systems and infrastructure (Linux and Windows), manage virtual environments, Active Directory/LDAP, backups and recovery, patching, and disaster recovery. Troubleshoot complex issues, perform security audits, implement security controls, develop DR plans, document configurations, and coordinate with IT teams. Provide technical guidance and may lead or mentor junior staff.

Join the 24/7 NOC as the first line of defense for infrastructure: monitor systems, triage and mitigate incidents, execute patching, repair hardware, maintain Linux and Microsoft environments, support customers, and develop SOPs and runbooks.

Monitor and maintain 24/7 NOC infrastructure, triage and mitigate system issues, perform patching and hardware repairs, manage Linux and Windows configs, support customers, document and improve SOPs, and complete NOC training and tool mastery.

Mid-level (requires extensive experience) systems administrator providing daily system administration and DevOps support. Responsibilities include Linux administration, containerization, Proxmox virtualization, configuration management with Ansible/Salt, scripting (Bash/Perl/Python), SSP compliance and STE/STN support, cloud/AWS operations, CIFS and Centrify administration. Supports mixed Linux/Windows environments and may assist Windows DC/Server/Exchange tasks.

Perform security-focused systems administration of Linux environments, managing containers (Docker), AWS, virtualization, and storage. Maintain IP networking and firewall configurations, support PKI/TLS/cryptography and crypto policies, and ensure SSP compliance and STE/STN support on Linux. Provide application support, troubleshooting, and work with automation tools; comply with DoD security and certification requirements.

Mid-level Linux Systems Administrator supporting a government program. Responsibilities include administering CentOS/RHEL/Rocky systems, upgrading servers/workstations, data transfer and Customer STE tasks, hardware installation, and troubleshooting networking and TLS. Requires active TS/SCI with favorable polygraph and around five years of relevant systems administration experience. Automation, Ansible, PXE, Proxmox, IDM/LDAP, Windows administration are desired.

Provide daily systems administration including Linux administration, storage management, KVM virtualization, automation with Ansible/Salt, FreeIPA administration, scripting (Bash/Perl/Python), SSP compliance, STE/STN support, and cloud/AWS operations to support mission requirements.

Operate as first-line NOC systems administrator for a 24/7 environment: monitor infrastructure, triage and mitigate incidents, execute patching, repair hardware, maintain Linux and Microsoft configurations, support customers, and create/improve SOPs and runbooks.