Top Linux Systems Administrator Jobs

As a Systems Administrator, you will manage classified IT systems, ensuring security compliance, desktop support, and server management while maintaining documentation and collaborating with security staff.

Maintain and administer Red Hat Linux and Windows Server systems, supporting server farms and cloud environments (AWS). Perform system tuning, account and storage management (SAN/NAS), integrate NM/EM systems, apply DISA STIG security baselines, document procedures, coach junior staff, and provide M-F and on-call support with occasional travel. Track SLA/ALP metrics and support backups and recovery.

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.

The Linux Systems Administrator will manage workstations and servers, interact with users, handle installations and maintenance, and assist in data center operations.

Administer and maintain Linux systems in cloud and containerized environments, troubleshoot systems, and ensure compliance with security standards and policies.

The Systems Administrator III manages Windows and Linux servers, VMware, O365, and IT infrastructure, providing support and mentoring to staff. Responsibilities include designing applications and maintaining business continuity plans.

Mid-level Linux Systems Administrator role supporting an aerospace and defense client onsite in Virginia Beach, VA. Must be a U.S. citizen with an active Secret clearance and fully vaccinated for COVID-19. Experience with cloud service providers and Kubernetes is preferred.

Lead Linux Systems Administrator managing RHEL environments and providing technical support for cybersecurity initiatives. Responsible for Ansible automation, Splunk monitoring, and overseeing lab operations.

Administer, harden, patch, and troubleshoot Linux servers and workstations for an Army air defense program. Support lab/dev environments, collaborate with engineers, document configurations, and respond to high-priority incidents to restore critical services.

Provide onsite Linux system and network administration for NAVAIR systems at Patuxent River NAS: install, configure, monitor, troubleshoot, and maintain LAN/WAN, VMware, SAN, and related hardware/software. Implement backups, disaster recovery, and security measures (STIGs/ACAS), support users, and respond to outages. Work requires DoD security compliance and collaboration with program and technical teams.

Manage and maintain Red Hat Enterprise Linux (RHEL 7/8/9) systems, perform patching, vulnerability remediation (SCAP/STIG/Nessus), user and access management, backups and restores, antivirus and Splunk integration, software installation/configuration, and collaborate with cybersecurity teams. Automate tasks using scripting and support virtualization and enterprise storage.

Senior Linux Systems Administrator responsible for managing and hardening RHEL/Windows systems, installing and maintaining UiPath Orchestrator, administering cloud resources in AWS/Azure, automating provisioning and patching, implementing security controls (STIGs/RMF), monitoring performance, and supporting high-availability and disaster recovery. Collaborates with DevOps, cybersecurity, and program teams to ensure mission alignment and operational resilience.

Lead Linux systems administrator for classified government contracts. Manage multi-user servers and networks, implement patches/updates, design backup and disaster recovery, enforce security controls and STIG/RMF compliance, lead change management, mentor staff, coordinate with vendors, and serve as senior liaison for A&A and ISSM processes. On-site role with occasional travel and after-hours support.

Lead administration and lifecycle management of classified HPC Linux environments: monitor performance, optimize systems, integrate and support developers, ensure cybersecurity compliance (STIG/JSIG/RMF), manage backups/disaster recovery, and mentor teams while supporting classified program requirements and authorizations.

Provide on-site Linux and HPC systems administration for a classified program: install/patch/monitor systems, manage backups, user accounts, security auditing, coordinate with engineering and vendors, recommend improvements, and support hardware diagnostics and repairs. Requires working under minimal direction, occasional after-hours support, and lifting equipment.

Operate and maintain enterprise Linux and Windows systems, manage virtualization and monitoring tools, automate tasks with scripts and system automation, enforce security best practices, and support mission-critical government IT infrastructure with an active TS/SCI+Poly clearance.

Administer, configure, and secure enterprise Red Hat/CentOS Linux servers supporting USCENTCOM. Manage services (Apache, Nginx, DNS, DHCP, LDAP), patching, performance tuning, SSL/TLS lifecycle, troubleshooting, documentation, and mentor junior staff while ensuring DoD security compliance and system availability.

The Linux Systems Administrator maintains Linux servers, manages system upgrades, monitors network environments, and develops automation scripts while ensuring system security and disaster recovery preparations.

Administer and engineer Linux systems for a PeopleSoft implementation: install/configure PeopleSoft, apply patches, optimize performance, design and document system configurations, manage accounts, ensure government cybersecurity compliance, develop analytical procedures, and collaborate with cloud engineers, developers, and security analysts.

Perform day-to-day Linux system administration for enterprise environments: deploy, configure, secure, patch, and upgrade RHEL servers and virtualized resources. Maintain VMs, integrate hardware/software, support networked devices, implement security compliance, document configurations, and decommission legacy systems to support a mission in Fort Meade, MD.

Lead and maintain secure Red Hat Enterprise Linux infrastructure for classified DoD programs. Provide technical leadership, mentor junior administrators, ensure compliance with security requirements, document processes, participate in change management, and support 24x7 operations with occasional after-hours work and limited domestic travel.

Provide second-tier Linux system administration for large-scale, multi-site deployments. Manage Red Hat systems, virtualization, storage (SAN, FC), clustered filesystems, security hardening, automated installs, scripting, backup, performance tuning, and support for developers and users.

Lead design, maintenance, and O&M of a secure Linux-based enclave: manage servers, VMs, switches, NAS, VLANs, VPNs; support developers; deploy and monitor nginx and security/monitoring tools; maintain documentation, compliance (RMF), patching, and monthly reporting.

Provide Linux workstation and server administration in physical and virtual environments: onboard users, image/configure workstations, troubleshoot systems and networks, monitor performance, plan upgrades/outages, install data center equipment, document infrastructure changes, and provide HelpDesk and occasional after-hours support.

The Linux Systems Administrator supports lab environments by maintaining hardware and operating systems, ensuring compliance, troubleshooting issues, and collaborating with teams.