Top Systems Administrator Jobs

Administers and supports client desktop, server, networking, virtualization, Microsoft 365, cloud, backup, and security environments. Resolves escalated infrastructure issues, manages tickets, troubleshoots complex systems, documents solutions, supports client environments, and mentors Systems Technicians. The role also contributes to process improvement, training, AI-enabled administration, and may participate in an on-call rotation.

Administer and improve server, network, cloud, software, hardware, backup, monitoring, and Microsoft 365 environments. Provide Tier 2 support, assist with infrastructure deployments, security assessments, user training, and IT modernization projects. Manage hypervisors, storage, disaster recovery, network equipment, and phone systems while supporting business users and participating in an onsite on-call rotation.

Provides Tier 2 technical support and systems administration, troubleshooting enterprise IT issues, documenting solutions, collaborating on advanced resolutions, and supporting after-hours or on-call needs. The role is onsite in Washington, DC, requires U.S. citizenship, an active Top Secret clearance with SCI eligibility, and DoD 8140 IAT II compliance.

Provides systems administration and IT support for DoD tactical, afloat, and laboratory environments. Plans, configures, tests, maintains, and upgrades operating systems and development/test environments. Performs troubleshooting, patching, backups, security assessments, vulnerability mitigation, and STIG compliance using Navy and DoD tools. Collaborates with cybersecurity, network, systems, and software engineers while supporting agile release and automation processes.

Build, manage, and optimize secure AWS cloud infrastructure across multi-account environments. Install and maintain servers and platforms, monitor performance, troubleshoot outages, manage access controls and backups, perform patching and STIG compliance, and support Kubernetes/EKS workloads. The role also contributes to infrastructure as code, disaster recovery, automation, technical documentation, and resilience engineering within a SAFe Agile program. An active DoD Secret clearance, five years of experience, and quarterly travel to Scott Air Force Base are required.

Provides day-to-day administration, break-fix support, patching, and security maintenance for physical and virtualized servers, systems, and applications. Configures security tools, scans endpoint integrity, resolves infrastructure issues, supports backend systems, collaborates with technical teams and vendors, documents solutions, and assists with new technology deployments.

Administer and support corporate IT infrastructure, including Windows servers and PCs, Active Directory, networks, firewalls, VMware, cloud services, backups, and security systems. Troubleshoot helpdesk and infrastructure issues, monitor performance and security, manage incident response, implement technologies, document procedures, coordinate user training, and support infrastructure projects. The role is onsite in Hayward, California, with occasional after-hours and weekend work.

Administers and supports institution-wide AI-enhanced systems, including Oracle Fusion, Insightstream AI, and related agents. Maintains integrations, configurations, updates, scheduled jobs, system performance, documentation, and data integrity. Troubleshoots issues, coordinates outages and planned changes, evaluates technology solutions, and supports adoption among faculty, administrators, and staff. The role also develops API- and script-based integrations and provides technical support across college locations.

Implements and maintains cybersecurity compliance controls for enterprise systems supporting USCENTCOM. Responsibilities include remediating ACAS/Tenable and STIG findings, patching Windows servers, applying DoD security directives, managing vulnerabilities, POA&Ms, certificates, PKI, SecureView, and compliance documentation. The role also develops PowerShell or Ansible automation, supports security architecture reviews, tracks remediation progress, and briefs technical and leadership stakeholders.

Administer and optimize cybersecurity infrastructure supporting U.S. Central Command. Configure and maintain SIEM, EDR, network access control, and SOAR platforms; develop detection rules, dashboards, integrations, automation scripts, and response workflows. Perform patching, audits, troubleshooting, compliance monitoring, documentation, training, and stakeholder support. The role requires Linux administration, cybersecurity expertise, a TS/SCI clearance, and U.S. citizenship.

Administers and supports complex enterprise networks across data centers and cloud environments. Responsibilities include network design, implementation, migration, troubleshooting, performance monitoring, security hardening, documentation, lifecycle management, and administration of Palo Alto firewalls and Cisco networking equipment. The role also supports DoD cybersecurity compliance, patch management, STIGs, disaster recovery, automation, and mission-critical Army IT services.

Supports implementation, troubleshooting, maintenance, configuration, and daily operation of IT systems. Provides Tier 1 and Tier 2 help desk support, resolves escalated issues, assists users, monitors client/server, storage, network, and mobile systems, and performs capacity planning. Configures and manages UNIX and Windows operating systems, maintains network integrity, improves reliability and performance, supports dispatch hardware, and communicates issue status and analysis to management and internal customers.

Supports the design, maintenance, implementation, and auditing of quality management systems across North American locations. Plans and conducts product and process audits, supports customer complaint investigations and corrective actions, performs dock audits, trains employees on documentation requirements, and prepares quality metrics. Requires internal auditing experience, understanding of technical drawings, root cause analysis, and quality standards such as ISO 9001 or IATF 16949. Travel is up to 10%.

Manage and optimize MN8 Energy’s Navan travel and expense platform, providing user support, analyzing global T&E spending, enforcing policy compliance, and improving operational efficiency. The role administers corporate cards, partners with Finance and IT on system controls and reporting, manages vendor relationships, and identifies cost-saving opportunities while safeguarding sensitive financial and employee data.

Administer and maintain Linux and Windows systems across cloud, hybrid-cloud, virtual, and physical environments. Automate deployment and operations, troubleshoot networking and specialized IT equipment, implement STIGs and GPOs, and support system integration and testing. Serve as site lead, coordinate maintenance and outages, document systems, guide junior administrators, and support ground and flight operations. The role requires flexible scheduling, on-call support, equipment handling, and up to 20% travel.

Provides hands-on IT administration and help desk support for onsite and remote users. Responsibilities include Microsoft 365, Entra ID, Intune, Azure, VPN, device, software license, phone, building access, and system inventory administration. The role supports onboarding, offboarding, workstation setup, vendor coordination, branch office deployments, troubleshooting, system rollouts, and documentation.

Manage and maintain enterprise IT infrastructure, including Windows servers, Active Directory, Microsoft 365, virtualization, storage, communications, and security systems. Responsibilities include patching, backups, monitoring, troubleshooting escalated issues, system hardening, documentation, compliance, technical reporting, procurement analysis, and collaboration with network, application, service desk, and federal teams.

Manage enterprise systems administration and patch management across Windows and Linux environments. Lead security patch deployment, vulnerability remediation, STIG-compliant image development, Tier III troubleshooting, and compliance reporting. Analyze ACAS/Nessus results, remediate critical DoD vulnerabilities within required timelines, maintain system security posture for ATO requirements, and support federal customer operations across multiple potential locations.

Administer and support Windows Server, Active Directory, Azure, Microsoft 365, networking, backups, monitoring, and hybrid identity environments. Provide L2/L3 escalation, troubleshoot infrastructure issues through log analysis, perform patching and recovery operations, support business applications and peripheral systems, and document configurations and procedures. Collaborate with infrastructure, network, security, application, and database teams across North America.

Provides onsite and remote support for Windows hardware, software, PCs, servers, and peripherals. Troubleshoots system, network, and performance issues; manages imaging, IT assets, documentation, monitoring, ticket escalation, and process automation. Supports cybersecurity and vulnerability management, disaster recovery testing, equipment recommendations, and end-user service. Requires communication with technical and non-technical users, regulatory compliance awareness, independent work, and on-call or after-hours availability.

Own and modernize a broad Microsoft infrastructure environment spanning Windows Server, Active Directory, Microsoft 365, Azure, identity, security, monitoring, backup, and recovery. Automate administration with PowerShell, troubleshoot complex production issues, improve resilience and security, and contribute to cloud architecture modernization. The role partners across technical and business teams and offers significant autonomy in a small infrastructure team.

Maintains Microsoft Windows servers, workstations, networks, databases, web applications, and related hardware/software. Responsibilities include system security, access control, backups, LAN monitoring, directory management, configuration and data management, equipment tracking, troubleshooting, upgrades, documentation, and user training. The role also supports process improvements, vendor contracts, operational reporting, and coordination across organizations. Requires independent judgment, broad systems knowledge, U.S. citizenship, and eligibility to obtain and maintain a government security clearance.

Supports and administers Microsoft 365, Exchange Online, Outlook, Teams, SharePoint, and related collaboration platforms. Responsibilities include account and mailbox administration, permissions management, troubleshooting email and access issues, ticket resolution, documentation, system maintenance, upgrades, migrations, and platform rollouts. The role also supports hybrid Exchange environments, partners with IT teams on root-cause resolution, participates in on-call rotations, and provides occasional onsite support in Newport News.

Administer and maintain Linux and Windows systems across physical and virtualized environments supporting classified defense research. Responsibilities include managing storage, networks, firewalls, Active Directory, Group Policy, monitoring, automation, patching, troubleshooting, SOPs, and production and development environments. The role requires active Top Secret/SCI with polygraph clearance, on-site work in Woburn, Massachusetts, and occasional after-hours maintenance support.

Provides field-based IT, networking, PC, connectivity, and industrial control-system support. Responsibilities include monitoring tickets, configuring routers and firewalls, maintaining Fiber Optic and Starlink connectivity, troubleshooting PLC and SCADA integrations, supporting system availability and security, documenting infrastructure, updating equipment, and training field personnel. The role collaborates with engineers and operations teams to resolve technical issues across offices and job sites.