Top Linux Systems Administrator Jobs

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.

Administer and maintain enterprise Linux environments supporting mission-critical testing and operational readiness. Responsibilities include system configuration, software installation, network component maintenance, Tier 1 incident troubleshooting, hardware support, Bash scripting, capacity analysis, monitoring, performance improvement, and customer communication. The role requires maintaining secure, stable, reliable, and repeatable Linux platforms for testing, validation, and deployment activities.

Provides on-site Linux systems administration for Department of State offices, managing servers, network equipment, workstations, applications, databases, patches, security controls, backups, incident tickets, configuration changes, monitoring, documentation, upgrades, and risk reporting. Requires coordination of hardware and software operations, technical support, and compliance with Department of State policies.

Administer and secure RHEL and Unix systems by remediating ACAS/Tenable and OpenSCAP findings, applying DISA STIGs, patching systems, enforcing SELinux and authentication controls, managing firewalls and audit logging, and automating compliance with Bash and Ansible. The role develops mitigation plans, prepares inspection evidence, and supports DoD cyber assessments in restricted environments. It requires an active Secret clearance and eligibility for Top Secret/SCI.

Manage and secure DoD RHEL and VMware environments on Dell enterprise hardware. Responsibilities include server and virtualization administration, HCI optimization, DISA STIG hardening, vulnerability remediation, secure networking, identity and access management, automation, and RMF documentation. The role requires extensive DoD system administration experience, security and platform certifications, and a Secret clearance.

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, patch, and troubleshoot Red Hat Enterprise Linux systems in a large HPC environment. Automate tasks with Ansible and support Red Hat Satellite, performance tuning, security compliance, software installs, testing, and documentation while collaborating with technical teams to meet mission requirements.

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.

Provide Red Hat/Linux systems administration and technical consulting in a DoN RDT&E environment: design and implement network architectures, administer servers and clustered systems in classified/unclassified networks, support workstations and applications, manage backups, software distribution, licensing, and user access, and collaborate with engineers and vendors.

Administer RHEL and Linux systems across classified and unclassified Navy networks. Apply patches, harden systems, remediate vulnerabilities, implement RMF and DISA STIG controls, and support virtualization and automated deployment. Develop administrative scripts, manage backups and disaster recovery, troubleshoot live mission systems, support incident response, maintain documentation, and assist with ATO packages, audits, change control, and configuration management. Periodic site visits and at-sea support are required.

Administer enterprise Linux infrastructure across classified and unclassified Navy networks. Responsibilities include RHEL administration, RMF and DISA STIG compliance, patching, hardening, vulnerability remediation, automation, virtualization, backup and disaster recovery, incident response, documentation, audit readiness, and mentorship. The role also supports ATO packages, configuration management, change control, and secure infrastructure improvements in a DoD environment.

Administers RHEL and Linux systems across classified and unclassified Navy networks at PMRF. Responsibilities include system hardening, patching, STIG and RMF compliance, vulnerability remediation, virtualization, automation, backup and recovery, incident response, documentation, and audit readiness. The role supports live mission environments, cybersecurity activities, change control, and periodic at-sea assignments. Requires an associate degree or equivalent experience, DoD IAT Level II certification, Linux+ or RHCSA certification, and eligibility for a Top Secret clearance.

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.

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.

Administer and secure Linux RHEL and broader IT infrastructure, including servers, networks, firewalls, encryption devices, and container platforms. Build automation and CI/CD capabilities, perform patching and deployments, manage system lifecycles, document configurations, resolve Tier II issues, and support accreditation and security compliance. Coordinate risk management with IT leadership and Information Assurance, validate system performance, and provide guidance to junior staff.

Senior Linux systems administrator responsible for Ubuntu/Debian server and network administration, virtualization (VMware, AWS), automation (Puppet, Kickstart), monitoring (Nagios/Ganglia/Cacti), firewall/load balancer/LDAP configuration, scripting, building/migrating data center infrastructure on Dell hardware, troubleshooting, documentation, and project status reporting.

Administer and monitor Linux and cloud systems supporting DIB company vetting and onboarding. Perform remote Linux administration via SSH, install software using RPM and YUM, gather system status, and support Docker, Kubernetes, Helm, Ansible, CloudFormation, Terraform, and Traefik environments. The role requires managing large Hadoop clusters and maintaining an active TS/SCI clearance with Polygraph.

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 on-site Linux systems administration for classified government contracts including AWS resource management, STIG implementation, patching, backup/recovery, monitoring, incident resolution, documentation, audits, and ticketing (ServiceNow/JIRA). Support multi-network environments, work after hours/on-call, lift equipment, and maintain strict information system security and audit logging requirements.

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.

Provide advanced systems administration and network/infrastructure support in a DoD/IC environment, ensuring high availability, security, STIG/IAVA compliance, virtualization management, automation with Python/Ansible, firewall and VPN administration, vulnerability scanning/remediation, and operational readiness for classified enterprise systems.

The LINUX System Administrator manages and supports high availability server/database/SAN platforms, ensuring 24x7x365 operation, monitoring, and documentation.

Senior Linux Systems Administrator responsible for Ubuntu/Debian server and network administration, virtualization (VMware), building AWS infrastructure, automation (Puppet, Kickstart), monitoring (Nagios/Ganglia/Cacti), scripting, firewall/load balancer configuration, troubleshooting, documentation, and project reporting during a data center rebuild and migration.