Top Systems Administrator Jobs

Maintain and support Linux systems, HCI clusters, and PaaS infrastructure for NASA’s high-performance computing environment. Responsibilities include Tier 3 escalation, Ansible and RHEL provisioning, monitoring, performance tuning, troubleshooting, configuration management, documentation, security compliance, customer support, and project leadership. The role also provides oversight for Linux workstation and Mac management services and requires collaboration across infrastructure and DevOps teams.

Maintains and supports large-scale Linux HPC clusters, storage, networking, schedulers, and system software. Responsibilities include patching, upgrades, deployment, monitoring, scripting, automation, performance tuning, benchmarking, troubleshooting, user support, configuration management, security infrastructure, documentation, and evaluation of emerging HPC technologies. The role supports NASA Ames supercomputing resources and requires after-hours or weekend support as needed.

Lead administration, architecture, implementation, migration, troubleshooting, and maintenance of complex SharePoint Server, SharePoint Online, Power Platform, and Windows Server environments supporting Army mission systems. Provide technical leadership, ensure platform availability and security, administer sites and servers, document procedures, support staging and service-level requirements, and train technical personnel and users. The role is onsite at the Pentagon and requires an active DoD Top Secret clearance and IAM Level II certification.

Maintain and monitor the Department of Defense Consolidated Command and Control system supporting MILSATCOM operations. Responsibilities include administering domain and archive file servers, maintaining operational network access and databases, managing software configurations and system interfaces, documenting system anomalies, preparing systems for operational use, and supporting operational testing. The role requires collaboration with operators, developers, engineers, testers, and vendors in a mission-critical satellite communications environment.

Administer and support Windows-based laboratory systems and infrastructure for NASA HSI research laboratories. Responsibilities include configuration, troubleshooting, software and hardware integration, system automation, documentation, security compliance, operational procedures, equipment handling, and onsite technical support during experiments and flight tests. The role collaborates with researchers, developers, engineers, and students to maintain reliable, secure, and high-availability laboratory environments.

Administers large-scale Linux HPC clusters, InfiniBand fabrics, storage systems, and supporting infrastructure. Responsibilities include system installation, patching, upgrades, monitoring, performance tuning, troubleshooting, user support, software integration, automation, documentation, and after-hours support. The role requires diagnosing RDMA, MPI, networking, and filesystem issues; maintaining fabric health; developing scripts; supporting schedulers and provisioning tools; and evaluating new HPC technologies.

Manage and support Windows servers, cloud environments, storage, backups, disaster recovery, Entra ID, endpoint management, and SaaS platforms. Design and maintain systems, monitor performance, troubleshoot hardware and software, support end users, coordinate vendors, implement upgrades, document procedures, and research technologies that improve availability, continuity, and performance. This hybrid California role includes approximately 20% travel and occasional ServiceDesk responsibilities.

Administer and secure Whisper Aero’s hybrid IT environment, including Microsoft 365, Azure, identity systems, Windows endpoints, servers, virtualization, patching, backups, disaster recovery, and endpoint security. Automate onboarding and offboarding with PowerShell or Python, manage SSO and SaaS provisioning, and support compliance with NIST or CMMC frameworks. The role also leverages AI tools for troubleshooting, scripting, and infrastructure log analysis.

Provides Tier II desktop and endpoint support for Windows and macOS environments, including VIP and executive assistance, incident resolution, AV support, endpoint provisioning, identity administration, asset lifecycle management, and office infrastructure support. Maintains devices through Intune, Jamf, or SCCM; manages Entra ID and Okta; documents procedures; supports hardware logistics; and collaborates with infrastructure and security teams. The role is hybrid in Dallas and requires on-call participation and occasional hardware handling.

Administers enterprise servers, endpoints, identity services, virtualization, backup systems, and cloud-based device management. Manages Intune, SCCM/MECM, Autopilot, Apple Business Manager, patching, imaging, compliance, and PowerShell automation. Supports Microsoft Teams Rooms and audiovisual systems, including installation, troubleshooting, maintenance, documentation, and vendor coordination. Collaborates with infrastructure, security, facilities, and business teams to maintain reliable, secure, and standardized IT operations.

Administers and supports campus access control, mobile access, surveillance, and transaction systems. Provides end-user technical support, troubleshoots hardware and software issues, monitors network resources, oversees helpdesk responses, produces status reports, maintains department websites, trains users, and improves system policies and procedures. Occasional after-hours and weekend support is required.

Maintain and engineer Microsoft Windows infrastructure supporting NSWC Carderock. Responsibilities include architecting MECM environments, managing Windows image deployment, coordinating patching and vulnerability remediation, administering Recast and SQL Server infrastructure, enforcing DISA STIG security baselines, developing PowerShell automation, producing inventory reports, supporting VMware environments, and providing Tier 3 troubleshooting for complex operating system, software, and deployment issues.

Designs, implements, and maintains secure, scalable IT infrastructure and cloud platforms. Leads systems administration, infrastructure optimization, security implementation, automation, networking, distributed computing, and IT projects. Mentors junior administrators, troubleshoots complex environments, develops scripts, manages vendors, prepares technical documentation and proposals, and presents to customers and professional audiences.

Maintains and supports LAN, WAN, Internet, hardware, software, and Linux systems for a NAVAIR software development program. Responsibilities include monitoring network availability, troubleshooting failures, applying upgrades and patches, optimizing system performance, maintaining backup and disaster recovery capabilities, planning service interruptions, and implementing security measures. The role is based at Patuxent River NAS and requires a Top Secret clearance, technical education or equivalent experience, Linux certification, and CompTIA Security+ or a DoD 8570-compliant qualification.

Administer and maintain large-scale HPC/AI environments, including compute, storage, networking, software stacks, and Slurm scheduling. Develop automation for provisioning, configuration, and monitoring; optimize systems for benchmarking, capacity planning, and performance. Support security patching, troubleshooting, application deployment, researcher support, documentation, vendor coordination, procurement, and lifecycle management. This remote or hybrid individual contributor role requires approximately four domestic trips annually and U.S. citizenship for access to government research facilities.

Provide corporate IT support across networking, infrastructure, hardware, software, and internal tools. Maintain operating systems, troubleshoot tickets and escalations, manage assets, support onboarding and offboarding, coordinate access with stakeholders, and help improve IT policies, procedures, security, and operational efficiency. The hybrid role supports multiple offices and remote employees while exploring new technologies and automation opportunities.

Supports company-wide IT networking, communications, infrastructure, hardware, software, and asset management. Provides frontline troubleshooting, ticket resolution, employee onboarding and offboarding support, and network and system access coordination. Maintains operating systems, applications, policies, and security procedures while researching technologies and improving internal processes. The role is hybrid, onsite three days weekly in Mountain View, and is a six-month contract.

Own and optimize Audacy’s NetSuite OneWorld environment, including financial modules, integrations, workflows, customizations, permissions, compliance, data management, testing, and user support. Lead full-cycle enhancements and implementations, partner with Finance and technical teams, troubleshoot integrations and scripts, manage releases and sandbox environments, document procedures, and mentor junior administrators.

Owns Cosm’s identity, endpoint, SaaS, and employee technology systems. Responsibilities include administering Okta, automating joiner-mover-leaver processes, managing zero-touch provisioning, deploying and maintaining macOS and Windows devices through Intune and Jamf, integrating SaaS applications, conducting access reviews, supporting audits, automating administration with scripts and APIs, and resolving escalated identity and endpoint issues. The role also develops documentation, enables service desk self-service, and mentors IT teammates.

Manage NTCSS Virtual Environment and NALCOMIS systems supporting Navy Reserve aviation logistics operations. Provide onsite administration at NAS JRB Fort Worth and remote support to aviation detachments, Fleet Readiness Centers, and squadrons. Responsibilities include systems and network administration, database administration, LAN and telecommunications support, desktop configuration, operating system and software administration, and support for aviation maintenance configurations including O-level and I-level NALCOMIS, OOMA, and OIMA systems.

Provides systems administration, virtualization, network infrastructure, and application support for DoD mission systems. Manages VMware environments, NetApp storage, Gigamon virtual taps, backups, disaster recovery, access controls, system performance, patching, upgrades, and DoD STIG compliance. Supports exercises, troubleshooting, technical integration, asset lifecycle management, procurement, and coordination with engineering, cybersecurity, and network teams. Requires Secret clearance, extensive infrastructure experience, C2 and maritime operations experience, and knowledge of Link 16 protocols.

Provides enterprise patch management and vulnerability remediation across Microsoft, Azure, SCCM, and on-premises environments. Responsibilities include vulnerability assessments, patch deployment, configuration corrections, scanner remediation, compliance baseline management, reporting, 24/7 incident support, and technical training. Ensures remediation activities meet DoD RMF, IAV, STIG, and NIST requirements.

Manage infrastructure across Linux and Windows environments, including virtualization, containers, networking, hardware, firewalls, and system deployments. Harden systems using DISA STIGs, conduct vulnerability remediation, provide Tier 2/3 support, interface with government customers, and support field deployments at remote test sites. The role requires active Secret-or-higher clearance, DoD experience, systems administration expertise, and travel exceeding 25%.

Designs, deploys, maintains, and secures Windows-based customer systems supporting mission needs. Responsibilities include system administration, automation and scripting, Agile requirements and testing, documentation, troubleshooting complex systems issues, patch management, hardening, monitoring, and rotating between operations and DevOps functions. The role requires collaboration across teams and an active TS/SCI clearance with polygraph.

Administers and expands AWS, Azure, Microsoft 365, server, network, identity, and hybrid cloud environments. Manages infrastructure security, performance, availability, troubleshooting, firewalls, Azure DevOps repositories and CI/CD pipelines. Supports developers and IT staff, automates administrative tasks, coordinates vendors, documents root causes, and maintains compliance. This is a fully onsite senior role with flexible hours, after-hours, weekend, and on-call coverage.