Top Systems Administrator Jobs

Manage and monitor classified information systems and networks, ensuring compliance with security policies and government regulations. Install and maintain secure hardware and software, conduct security assessments and audits, mitigate vulnerabilities, support incident investigations, and provide technical assistance and training to users. The role requires classified-systems administration experience, security certifications, strong analytical skills, and a Secret clearance.

Provides advanced administration and operational support for large-scale Linux systems and clusters. Responsibilities include installing and maintaining software, monitoring compute, network, memory, and storage components, troubleshooting Tier 1 and Tier 2 issues, configuring UNIX and Windows systems, managing virtualization and security, optimizing performance, and supporting system architecture. The role also requires scripting, automation, containerization, capacity planning, user assistance, and resolution of complex hardware, application, and integration problems.

Administer and maintain enterprise Windows and Linux systems, VMware virtualization, Active Directory, storage, cloud platforms, and endpoint infrastructure. Responsibilities include patching, troubleshooting, hardware installation, security hardening, vulnerability remediation, monitoring, and Tier-2 support. The role supports Azure, AWS, and GCP modernization initiatives while collaborating with senior engineers and cybersecurity teams.

Administers enterprise infrastructure across Windows servers, endpoints, identity, networks, security platforms, virtualization, and backup/DR. Responsibilities include Active Directory administration, server hardening and patching, endpoint protection, firewall and VPN support, VMware operations, backup verification, compliance with NIST 800-171/CMMC practices, change management, documentation, and Tier 2/3 support. The role requires collaboration with cybersecurity and infrastructure teams and may involve occasional onsite, evening, or weekend work.

The Senior Systems Administrator administers Microsoft networks and systems, including servers, workstations, remote administration, GPO, backups, recovery, monitoring, collaboration platforms, datacenter infrastructure, cloud services, virtualization, SANs, and asset management. The role provides advanced remote troubleshooting and customer service in a classroom and office environment. It requires maintaining required certifications and a U.S. Government Top Secret clearance with SCI eligibility.

Provide end-to-end storage administration across dispersed sites, supporting multi-vendor high-performance storage, mass storage systems, Fibre Channel fabrics, operating systems, networks, and related software. Troubleshoot hardware and system issues, manage Linux, Unix, and Windows environments, maintain network integrity, plan capacity, optimize reliability and performance, monitor infrastructure, and resolve client/server, storage, network, and mobile-device problems.

Provide end-to-end administration and support for distributed, multi-vendor high-performance storage environments. Responsibilities include troubleshooting hardware, configuring Linux, Unix, and Windows systems, maintaining network integrity, optimizing operations, capacity planning, monitoring infrastructure, resolving client/server and storage issues, and implementing reliability and performance enhancements across storage, network, and mobile devices.

Administers and troubleshoots Linux systems supporting high-performance computing environments. Responsibilities include operating system installation, file systems, networking, Bash scripting, software compilation, application troubleshooting, HPC architecture, high-speed and storage fabrics, Lustre and DDN Exascaler administration, router and switch management, monitoring, automation, benchmarking, and proactive evaluation of emerging technologies.

Administer and troubleshoot Linux-based HPC systems, storage fabrics, filesystems, networks, and applications. Responsibilities include OS installation, filesystem configuration, Bash scripting, software compilation, Lustre and DDN Exascaler administration, TCP/IP and high-speed networking, router and switch support, benchmarking, and monitoring. The role requires familiarity with automation, scheduling, observability, collaboration, and version-control tools, along with an active TS/SCI clearance with polygraph.

Administer and troubleshoot Linux systems supporting high-performance computing, large-scale data analytics, storage fabrics, and high-speed networks. Responsibilities include operating system installation, filesystem configuration, networking, application troubleshooting, Bash scripting, software compilation, Lustre and DDN Exascaler administration, router and switch management, monitoring, automation, benchmarking, and support for HPC technologies such as Slurm, InfiniBand, and emerging storage platforms.

Administer and troubleshoot Linux-based high-performance computing systems, storage fabrics, and networking infrastructure. Responsibilities include operating system installation, file system configuration, TCP/IP networking, Bash scripting, software compilation, Lustre and DDN Exascaler administration, router and switch support, monitoring, automation, benchmarking, and troubleshooting HPC environments using tools such as Slurm, Ansible, Grafana, and Prometheus. An active TS/SCI clearance with polygraph is required.

Administer and maintain enterprise Windows and Linux server environments supporting Intelligence Community customers. Responsibilities include deployments, upgrades, patching, monitoring, performance tuning, troubleshooting, backup and recovery, documentation, configuration management, infrastructure changes, and lifecycle planning. The role also supports secure server rooms, vendor coordination, on-call operations, and mission-critical infrastructure availability.

Manage servers, storage, virtualization, networks, security controls, backups, and disaster recovery. Troubleshoot infrastructure and end-user issues, provide technical training, enforce security and compliance practices, plan technology upgrades, and identify automation and performance optimization opportunities. The role requires extensive systems administration experience and collaboration with management to support scalable IT infrastructure.

Manages, configures, maintains, and supports servers, computer systems, networks, and critical IT infrastructure. Troubleshoots hardware, software, and network issues; monitors and optimizes system performance; implements security controls; maintains technical documentation; collaborates with IT teams; and supports system upgrades and migrations. Requires a bachelor’s degree and nine years of relevant experience or equivalent, plus IAT Level II certification and eligibility for Secret-level classified information.

Manages, configures, maintains, and supports IT infrastructure including servers, networks, and critical systems. Troubleshoots hardware, software, and network issues; monitors and optimizes system performance; implements security controls; maintains technical documentation; collaborates with IT teams; and assists with system upgrades and migrations. Requires a Secret clearance eligibility and IAT Level II certification.

Administers and strategically develops the organization’s Microsoft cloud environment, including Azure, Microsoft 365, Entra ID, and hybrid identity services. Responsibilities include cloud governance, security and access management, architecture, migrations, automation, backup and recovery, troubleshooting, documentation, and staff training. The role serves as a senior technical advisor, leads modernization initiatives, and supports reliable, secure, and cost-effective cloud operations.

Administer and engineer large-scale Linux systems and containerized applications in AWS. Monitor system health, troubleshoot issues, maintain storage, networks, hardware, scripts, patches, upgrades, security requirements, and user accounts. Provide rotational after-hours support and collaborate on infrastructure operations in a secure, classified environment.

Provides systems administration, technical support, hardware and software maintenance, virtualization management, user assistance, classroom support, account administration, backups, and troubleshooting for intelligence training systems. Manages VMware infrastructure, VDI environments, applications, networks, and classified systems while maintaining documentation, security compliance, system baselines, and operational reports. Requires occasional after-hours support and active Top Secret/SCI access.

Administers Windows network infrastructure, Exchange, Office 365, network hardware, desktop systems, connectivity, backups, security controls, software licensing, and technology upgrades. Provides technical support to more than 235 users across over 500 devices, troubleshoots hardware and software issues, monitors system performance, maintains high availability, and supports technology procurement and adoption. Travel to tribal-area offices and occasional work outside normal hours may be required.

Administers server operations, operating systems, databases, software, hardware, and network systems. Responsibilities include installation, configuration, monitoring, troubleshooting, backups, database administration, file recovery, patching, capacity planning, system optimization, network testing, and user IT support. The role requires significant systems administration experience and an active TS/SCI clearance with polygraph.

Administer Windows network infrastructure, Exchange, Microsoft 365, firewalls, routers, switches, desktops, and communication systems. Provide network and desktop support for more than 500 devices and 235 users; troubleshoot hardware, software, and connectivity issues; manage backups, security controls, licensing, upgrades, maintenance, and technology purchases. Monitor system performance, maintain availability, implement enhancements, and travel to tribal offices as needed.

Provides Tier 1 and Tier 2 infrastructure support in secure laboratory environments. Administers Linux systems, virtualization, servers, clients, networking, storage, and backup technologies. Resolves service requests, restoration tickets, and escalations; supports technical implementations and cross-functional projects; applies compliance frameworks and process improvement practices. Requires an active Secret clearance, U.S. citizenship, relevant professional experience, virtualization expertise, Linux administration skills, NIST 800-53 knowledge, and IAT Level II certification.

Supports Salesforce and other business systems through user administration, troubleshooting, data imports and cleanup, process automation, documentation, training, and system improvements. The role collaborates cross-functionally to resolve requests, improve operational efficiency, maintain data quality, and support user adoption. It also includes ongoing Salesforce learning and progress toward Salesforce Administrator certification.

Administer and optimize AWS cloud infrastructure while developing Python applications, REST APIs, and AI solutions. Automate deployments with Terraform and CI/CD, implement security and disaster recovery practices, monitor systems, troubleshoot complex infrastructure and application issues, and support secure production operations. The role also involves database integration, code reviews, technical documentation, mentorship, on-call participation, and continuous improvement across cloud and software development environments.

Administer and optimize AWS cloud environments using Terraform while developing and deploying Python-based AI applications. Responsibilities include infrastructure provisioning, monitoring, troubleshooting, security, access management, backups, API integration, testing, Git-based development, and automation. The role collaborates with senior engineers and AI Operations teammates to improve cloud reliability, application functionality, security, and operational efficiency.