Top Systems Administrator Jobs

Manages and maintains classified enterprise computing infrastructure for an Intelligence Community customer. Responsibilities include procuring, deploying, operating, and maintaining desktop, voice, video, internet, and network services; administering accounts; documenting systems; tuning performance; installing software; enforcing computing-resource policies; preparing monthly metrics reports; and resolving technical issues in a security-compliant environment. The role requires collaboration, customer service, strong communication, and potentially 24/7 on-call support.

Administers and improves enterprise infrastructure, including virtual servers, storage, operating systems, databases, security systems, monitoring, reporting, disaster recovery, and system integrations. Troubleshoots complex technical issues, manages upgrades and migrations, maintains documentation and standards, supports budgets and strategic planning, and mentors junior administrators. The role requires extensive infrastructure experience, DoD IAT Level II certification, U.S. citizenship, and an active Secret or higher clearance.

Administer Red Hat Linux, AWS cloud infrastructure, open-source platforms, and scalable big-data environments. Build CI/CD pipelines, maintain systems, patch applications, manage backups and VPNs, troubleshoot production issues, and support security compliance. Lead AWS and cluster networking design, monitor systems, respond to incidents, coordinate vendors, and develop secure configurations across development, test, and production environments.

Administer and support Siemens Teamcenter and related PLM environments, including configuration, upgrades, patching, monitoring, troubleshooting, deployments, user support, documentation, and integrations with ERP, MES, and engineering systems. The role also supports multi-tier architectures, automation, system enhancements, vendor coordination, and continuous improvement across production and test environments.

Administers and engineers classified computing systems supporting the GPS satellite mission. Responsibilities include GitLab administration, automation and scripting, system monitoring, performance analysis, hardware and software configuration, virtual machine and database support, cybersecurity compliance, vulnerability remediation, application deployment, disaster recovery, mission operations, and technical documentation. The role is fully onsite and requires an active Secret clearance, U.S. citizenship, a bachelor’s degree, five or more years of related experience, and Security+ certification.

Administer and maintain Windows and Linux server infrastructure, including installation, patching, troubleshooting, Active Directory, DNS, DHCP, backups, security controls, virtualization, and performance monitoring. Support system upgrades, migrations, configuration management, disaster recovery, vulnerability assessments, incident response, and technical documentation. The role requires an active TS/SCI clearance with a current full-scope or counterintelligence polygraph and supports Boeing mission operations systems in Herndon, Virginia.

Administer and maintain enterprise computing infrastructure, including Windows servers and desktops, applications, networks, virtual machines, storage, cloud services, and automated deployment systems. Troubleshoot software and network issues, manage patch compliance, develop PowerShell, VBScript, and Ansible automation, create operational documentation, and support application integration. Collaborate with management, engineering teams, developers, and internal customers on a complex government technology program.

Administers and optimizes enterprise NAS/SAN storage environments across multiple vendors. Responsibilities include provisioning, configuration, upgrades, monitoring, migrations, capacity planning, troubleshooting, documentation, policy development, root cause analysis, and technical mentorship. The role supports Windows, Linux, and VMware environments; coordinates cross-functional projects; participates in on-call rotations; and may require occasional after-hours work.

Administer and optimize Gainsight, Gong, and related Customer Experience systems. Build workflows, health scores, dashboards, integrations, and customer success programs supporting onboarding, renewals, and risk mitigation. Maintain data integrity, gather requirements, lead system enhancement projects, and collaborate with CX, Product, and RevOps teams. Provide training, documentation, stakeholder communication, and operational insights through KPIs and reporting.

Administers enterprise network and systems infrastructure across seven sites, including firewalls, switching, wireless, WAN, storage, DNS, Microsoft 365, Entra ID, Windows Server, endpoint management, backups, and disaster recovery. Maintains documentation, ITSM records, compliance controls, and recovery procedures; supports helpdesk escalations and participates in on-call incident response. The role also contributes to strategic infrastructure initiatives and requires strong automation, troubleshooting, and operational ownership.

Supports night-shift manufacturing IT operations, including Windows and Linux systems, networks, databases, business applications, MES, SAP, and plant-floor technology. Provides Tier 2 escalation support, performs root-cause analysis, manages upgrades and backups, administers access and security permissions, supports disaster recovery, coordinates vendors, develops SQL reports, and contributes to technology projects and continuous improvement.

Administer classified IT systems in closed areas, including Active Directory, desktop systems, virtual servers, patching, domain services, logging, vulnerability remediation, and endpoint hardening. Maintain documentation and configuration baselines while supporting RMF, STIG, accreditation, audits, and incident response requirements. Collaborate with security personnel and perform occasional after-hours maintenance. The role is fully onsite and requires handling equipment in secure rooms.

Own and improve Salesforce and go-to-market systems, including automation, integrations, CPQ migration, quoting workflows, product catalogs, pricing rules, data structures, and reporting processes. Partner with Sales, Marketing, Finance, Revenue Operations, and Customer Success teams to scope and implement scalable solutions. Administer AI-powered tools, document workflows, conduct training, and support cross-functional strategic decisions.

Administers classified, air-gapped IT systems in a 100% onsite environment. Responsibilities include managing Active Directory, Lab-in-a-Box environments, VMware, Veeam, Trellix ePO, Nessus, Splunk, domain controllers, secure wipes, data-spill response, vulnerability remediation, STIG and RMF compliance, documentation, and audit readiness. Provides coordination with security stakeholders and occasional after-hours or weekend maintenance and incident-response support.

Provides onsite administration and security support for classified, air-gapped IT systems and lab environments. Responsibilities include Active Directory, VMware, Veeam, Trellix, Nessus, Splunk, vulnerability remediation, backup and recovery, data-spill response, secure sanitization, STIG and RMF compliance, documentation, and audit readiness. The role requires collaboration with security stakeholders and occasional after-hours support.

Administer, configure, customize, secure, and maintain the Teamcenter PLM system. The role manages workflows, data models, user access, integrations, upgrades, troubleshooting, and end-user support. Candidates will collaborate with stakeholders to implement business solutions, automate tasks, and support CAD integrations. A bachelor’s degree, at least five years of Teamcenter administration experience, U.S. citizenship, and eligibility for a Top Secret clearance are required.

Provides systems administration and cybersecurity support for USSOCOM infrastructure at MacDill AFB. Responsibilities include tier-one and tier-two troubleshooting, server builds, operating system patching, backups, VDI support, network and application monitoring, and hardware/software issue resolution. Maintains STIG compliance, eMASS packages, POA&Ms, security plans, vulnerability documentation, and configuration records. Supports change control, information assurance guidance, system owners, and cybersecurity documentation.

Administers classified Windows environments across multiple networks, including Active Directory, Group Policy, patching, monitoring, backups, recovery, configuration management, security compliance, auditing, and troubleshooting. Coordinates with engineering, networking, desktop, cybersecurity, and project teams; maintains technical documentation and supports ticketing systems. Requires on-site work, occasional after-hours support, a current Secret clearance, Security+ certification, and substantial systems administration experience.

Designs, implements, administers, monitors, and supports enterprise infrastructure across Windows and Linux systems, virtualization, cloud platforms, identity services, databases, applications, storage, and collaboration tools. Provides Tier 3 escalation support, troubleshooting, disaster recovery, documentation, change management, and continuous global infrastructure monitoring. Leads system design and IT initiatives, supports digital transformation, maintains Active Directory and related services, and participates in 24/7 on-call operations.

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.