Top Systems Administrator Jobs

Lead the design, implementation, operation, security, compliance, and lifecycle management of a customer program’s Linux-focused computing environment. Manage servers, networks, platform services, developer tooling, patching, vulnerability remediation, documentation, and operational alerts. Coordinate the supporting team and serve as liaison among the customer, program manager, and enterprise technology organization. The position requires an active TS/SCI clearance, U.S. citizenship, and on-site work in Tucson, Arizona.

Administers and optimizes high-performance computing infrastructure, including Linux and Windows systems, compute nodes, parallel storage, InfiniBand networks, Slurm scheduling, backups, virtualization, and monitoring. Supports system imaging, patching, security, disaster recovery, capacity planning, software licensing, and infrastructure upgrades. Collaborates with enterprise IT, information security, vendors, faculty, and students; documents procedures, provides technical guidance, participates in projects, and performs on-call support. Requires hands-on troubleshooting, automation, customer service, and continuous infrastructure improvement.

Administer enterprise analytics systems for Department of the Navy environments, supporting Tableau Server/Cloud, data pipelines, virtualized servers, access controls, system maintenance, and dashboard performance. Resolve multi-tier technical issues, data conversion anomalies, publishing errors, and vulnerabilities. Implement DoD cybersecurity requirements, maintain documentation, support demonstrations and training workflows, and provide technical reports to leadership. The role requires collaboration with government stakeholders and contractors while maintaining secure, reliable, and optimized system operations.

Provide systems administration, engineering, application, and hardware support for mission-critical federal systems. Administer and troubleshoot Windows servers, workstations, networks, databases, email services, virtualization, and security configurations. Monitor system health, resolve integration and data-flow issues, perform upgrades and patching, support Hyper-V virtualization, and respond to customer technical requests. The role is onsite in Annapolis Junction and requires an active TS/SCI clearance.

Administer and optimize Workday Financials, manage releases and integrations, maintain security and data integrity, support testing and deployments, produce reports and documentation, train users, and collaborate with Finance, IT, and vendors to improve processes and ensure compliance.

Administers and improves Salesforce-centered business systems, including configuration, automation, integrations, security, release management, testing, documentation, and platform support. The role troubleshoots connected billing, tax, and scheduling systems, maintains system health, and partners with business analysts and stakeholders to deliver reliable solutions.

Administers digital banking, payment, and Treasury platforms, including configurations, access, integrations, file transfers, testing, upgrades, and troubleshooting. Coordinates vendors and cross-functional teams, supports implementations, develops procedures and training materials, and provides Tier 3 support. Maintains SOX controls, access reviews, reconciliations, audit evidence, system documentation, and issue remediation. Identifies process improvements that reduce manual work, improve reliability, and strengthen controls.

Administer and optimize Windows and Linux infrastructure supporting classified programs. Collaborate with cybersecurity, networking, storage, engineering, and technology teams to resolve infrastructure and compliance challenges. Develop and enforce system administration standards, participate in change management, provide technical guidance, and maintain secure, reliable 24x7 operations. The role is fully onsite at White Sands Missile Range and may require up to 20% domestic travel.

Administer, deploy, configure, and maintain AWS cloud applications across Windows and Linux environments. Manage financial and analytics applications, batch processes, backups, user accounts, monitoring, incident resolution, security compliance, and infrastructure modifications. Automate production processes, optimize system performance and cost, coordinate maintenance, and provide customer and on-call support for national security systems.

Administers Windows workstations and physical and virtual servers in a Microsoft Active Directory environment. Manages VMware infrastructure, patching, backups, vulnerability remediation, DISA STIG compliance, configuration automation, outage resolution, and PowerShell scripting. Supports INFOSEC, IA, RMF, and Zero Trust requirements while assisting with system lifecycle management, analysis, and modernization. Requires a current TS/SCI clearance and CompTIA Security+ certification.

Administer Microsoft 365, Entra ID, Intune, Azure, AWS, networks, VoIP, and security infrastructure. Develop PowerShell and Power Automate solutions, support AI platforms, troubleshoot escalated technical issues, mentor junior staff, and lead infrastructure projects, technology rollouts, and acquisition integrations across a multi-site organization.

Administer mixed Linux and Windows enterprise systems, including MECM/SCCM, endpoint lifecycle management, OS deployment, patching, application distribution, Active Directory, virtualization, storage, backups, and identity services. Maintain security compliance with DISA STIGs, vulnerability scans, remediation, endpoint security tools, and POA&Ms. Support PKI, CAC authentication, logging, documentation, and collaboration with cybersecurity and infrastructure teams in an on-site DoD environment.

Owns the architecture, administration, integrations, compliance, automation, and optimization of the enterprise finance technology stack, including NetSuite and Coupa. Designs and maintains API, EDI, and SFTP data pipelines; troubleshoots system and synchronization issues; supports SuiteScript, Python, JavaScript, SQL, and MuleSoft automation; ensures SOX and ITGC compliance; partners with finance and business teams on scalable solutions; and maintains technical documentation and runbooks.

Administer and support enterprise computer systems, servers, workstations, applications, operating systems, and infrastructure. Resolve complex incidents, maintain system availability and security, implement backup and disaster recovery solutions, and improve automation and monitoring. Lead or contribute to migrations, upgrades, implementations, and technical projects. Create documentation, collaborate with internal teams and vendors, provide technical guidance, and participate in on-call and after-hours maintenance activities.

Designs, administers, secures, and automates enterprise Linux infrastructure across physical, virtual, and cloud environments. Responsibilities include configuration management, patching, monitoring, storage and networking, identity integration, backup and disaster recovery, vulnerability remediation, compliance support, incident escalation, and infrastructure project leadership. The role mentors technical staff, develops standards and documentation, participates in on-call support, and contributes to infrastructure architecture and roadmap decisions.

Designs, administers, secures, and operates Windows Server and Azure infrastructure, including identity, networking, monitoring, patching, backup, disaster recovery, and automation. Leads complex incident resolution, infrastructure migrations, site buildouts, compliance efforts, and security hardening. Mentors administrators, establishes technical standards, supports Microsoft 365 and endpoint management, maintains documentation, and participates in on-call support and occasional maintenance travel.

Administer and secure Windows and Linux systems across physical, virtualized, classified, and air-gapped environments. Responsibilities include Tier 2 troubleshooting, patching, vulnerability remediation, system hardening, compliance validation, account administration, automation, OS deployment, networking, virtualization, monitoring, backups, and documentation. The role requires active DoD Secret clearance, Security+ certification, and onsite work in Beavercreek, Ohio, with after-hours support and on-call participation.

Administer and secure global Windows, Linux, cloud, virtualization, networking, identity, storage, backup, and end-user systems. Serve as the Tier 3 escalation point for infrastructure and laboratory technology incidents, lead infrastructure projects, automate administration, support compliance requirements, and manage vendors across US, UK, and Australia operations.

Maintains and configures servers, systems, networks, and connected infrastructure while leading automation and AI-assisted troubleshooting. Manages vulnerability scanning, patching, hardening, log analysis, data protection, observability, documentation, runbooks, and operational processes. Validates AI-generated commands and findings before production use, supports security remediation, creates SLA reporting, mentors IT staff, and improves customer service and operational reliability.

Administers and secures classified and unclassified Linux and Windows infrastructure for government research programs. Responsibilities include server, network, virtualization, hardware, backup, recovery, security hardening, vulnerability remediation, compliance, documentation, and operational readiness. The role supports physical infrastructure, automation, audits, system sanitization, and coordination with customers, researchers, security teams, and subcontractors at a fully on-site Maryland customer location.

Leads administration, security, modernization, and optimization of enterprise infrastructure supporting government operations. Manages Windows Server, Active Directory, Microsoft 365, virtualization, cloud, storage, backup, disaster recovery, and PowerShell automation. Oversees patching, hardening, compliance, vulnerability remediation, performance monitoring, troubleshooting, documentation, and infrastructure initiatives. Provides technical leadership, stakeholder guidance, and mentorship to junior administrators while supporting DoD mission systems.

Administers, maintains, secures, monitors, and optimizes enterprise IT systems supporting government mission operations. Responsibilities include Windows Server and Microsoft 365 administration, Active Directory and Group Policy management, virtualization, patching, backups, disaster recovery, cloud migration, vulnerability remediation, documentation, troubleshooting, and customer support. The role collaborates with infrastructure, networking, cybersecurity, engineering, and application teams.

Owns Zuora administration, configuration, testing, integrations, billing operations, payment optimization, compliance, and cross-functional billing projects. The role translates business requirements into scalable billing solutions, supports product launches, troubleshoots platform issues, improves collections, reduces failed payments, and advises leadership on billing technology strategy.

Supports federal hosting operations through automated Linux and Windows patching using AWX/Ansible. Responsibilities include monitoring and troubleshooting patch jobs, validating system health, administering servers, remediating vulnerabilities, supporting AWS environments, maintaining configurations and documentation, and coordinating incident, change, and compliance activities. The role requires scheduled nighttime maintenance availability and participation in on-call support.

Administers and supports Windows-based workstation, file, and web server systems. Installs hardware and software, performs upgrades, manages accounts, monitors configurations, and maintains network security tools including firewalls, antivirus, and intrusion detection. Troubleshoots systems, updates web pages and documentation, trains staff, and assists customers with information technology requirements.