Top Systems Administrator Jobs

Supports Tier 1 and Tier 2 help desk and systems administration for Army users and enterprise endpoints. Monitors and troubleshoots network, cloud, hardware, software, and security systems; manages LAN/MAN/WAN, Wi-Fi, operating systems, SIEM events, vulnerabilities, and system configurations. Maintains network availability and security, resolves operational failures, supports NIPRNET and SIPRNET environments, responds to surge requirements, coordinates escalations, and mentors help desk specialists.

The role involves supporting Windows and Linux environments, maintaining security compliance, collaborating across teams, and managing virtual infrastructure in a mission-critical setting.

Administer and maintain enterprise Windows Server environments and Microsoft services (AD, DNS, DHCP, Exchange, Azure). Monitor, troubleshoot, tune performance, apply IAVA/IAVB patches, manage SQL databases, support secure, high-availability infrastructure, and document system improvements. Provide global support and occasional travel to other Navy commands.

Maintain and enhance Windows systems and infrastructure supporting NASIC production networks and research environments. Collaborate with systems, network, and storage administrators to ensure high availability, security, and integrity across Windows and Linux environments. Responsibilities include system administration, configuration management, certificate services, scripting, hardware and firmware maintenance, backup and restoration, and storage administration. The role requires effective communication, problem-solving, and stakeholder collaboration, with eligibility for a TS/SCI clearance and IAT Level II certification.

Administer and architect enterprise Linux, Windows, virtualization, hybrid cloud, storage, backup, observability, and infrastructure automation environments. Lead patching, vulnerability remediation, hardening, compliance, incident response, disaster recovery, and infrastructure projects. Automate operations with PowerShell, Python, and Bash; support CI/CD, containers, and infrastructure as code. Serve as a Tier 3 escalation, mentor administrators, and contribute to mission control, ground systems, and real-time Axiom Station flight operations.

Lead internal IT operations, including Microsoft 365 tenant migration and administration, Okta and Entra ID identity management, Windows endpoint management through Intune, and service desk supervision. Manage onboarding, offboarding, assets, vendors, ITSM processes, documentation, incidents, and compliance evidence supporting SOC 2 and CJIS requirements. Coordinate with technical, security, and parent-company teams during organizational decentralization, and provide occasional after-hours incident support.

Provides Tier 2 IT operations and end-user support in DHS environments. Responsibilities include installing, configuring, troubleshooting, and maintaining Windows workstations, laptops, peripherals, software, and related services; managing incidents and service requests through an ITSM tool; providing on-site and walk-up support; maintaining documentation; and supporting after-hours operational needs.

Administer and engineer production RHEL servers supporting SOC Engineering across cloud and on-premises environments. Responsibilities include provisioning, patching, hardening, STIG compliance, backups, infrastructure configuration, automation, Windows and Cisco administration, and SIEM/SOC support. The role collaborates with security analysts and engineers to align telemetry ingestion with detection, monitoring, and compliance requirements.

Provides implementation, troubleshooting, maintenance, monitoring, and daily operations support for IT infrastructure. Handles Tier 1 and Tier 2 support, escalated problem resolution, system configuration, capacity planning, and user assistance. Configures and manages UNIX and Windows operating systems, network components, and operating system enhancements. Requires active TS/SCI with Polygraph clearance and extensive systems administration experience.

Provide on-site support across macOS and Windows environments, troubleshoot hardware, software, and networks, administer servers, manage Veeam/NAS/S3 backups, deploy endpoints, write automation scripts, resolve escalated issues, and maintain IT documentation. The role requires full-time on-site work in South San Francisco and supports life sciences and biotech clients.

Administer and optimize Oracle EPBCS, including applications, metadata, business rules, security, workflows, dashboards, forms, and reporting. Support budgeting, forecasting, financial reviews, and ad hoc analysis while troubleshooting issues, managing enhancements, documenting procedures, and training users. Partner with Finance, IT, Oracle, implementation partners, and business stakeholders to improve planning processes and system performance.

Administer and optimize Oracle EPBCS for budgeting, forecasting, reporting, security, workflows, and financial planning. Troubleshoot issues, support users, manage annual budget setup, create documentation and training, and coordinate with Oracle and implementation partners. Partner with Finance, IT, and business stakeholders on system enhancements and process improvements while supporting financial analysis, reviews, forecast accuracy, and ad hoc reporting.

Administer and integrate Linux servers and enterprise applications, including installation, configuration, patching, upgrades, backups, storage, filesystems, logging, and lifecycle management. Troubleshoot complex operating system, performance, and availability issues; manage VMware and ESXi environments; configure database-connected applications and SSL certificates; and participate in on-call support. May mentor junior team members and perform occasional on-site visits in the San Antonio area.

Support secure and accredited DoD information systems for the AEWTTR program at China Lake. Responsibilities include cybersecurity, RMF and system accreditation activities, vulnerability assessment and remediation, STIG compliance, technical documentation, cybersecurity artifacts, stakeholder communication, and problem resolution. The role requires independent work onsite, coordination with government and contractor personnel, and adaptation to changing mission priorities.

Administers hybrid on-premises and cloud infrastructure, including servers, identity and access management, endpoints, backup and recovery, communications, and endpoint security. Provides advanced technical support, enforces data protection and compliance policies, evaluates automation and AI tools, and executes technology improvement projects. Independently prioritizes work, assesses technical risks, and recommends secure, reliable infrastructure solutions.

Maintains and optimizes Windows and Linux servers, manages installations, upgrades, configurations, virtualization, and cloud services. Troubleshoots system issues, implements security and compliance measures, manages backups and disaster recovery, conducts audits, supports end users, and improves systems administration processes.

Provides IT support in collateral and Special Access Program environments, troubleshooting DoD client systems, managing user accounts and permissions, and resolving service requests. Supports SharePoint collaboration sites, SAP applications, COMSEC equipment including TACLANEs and ViPERs, and security-compliant system access. Requires extensive enterprise IT experience, DoD 8140 certification, U.S. citizenship, and Secret clearance with SAP eligibility. The role is based at Eglin AFB and requires 5–10% travel.

Provides onsite Tier 1 systems, hardware, network, application, storage, virtualization, and audio-visual support in classified and unclassified lab environments. Responsibilities include monitoring systems, troubleshooting issues, managing accounts and software updates, maintaining Linux and Windows infrastructure, supporting events, analyzing cyber reports, and assisting with installations and system verification. The role requires an active Secret clearance, Security+ certification, and familiarity with Red Hat, Active Directory, virtualization, and network administration.

Provide 24/7 systems monitoring and user support for ground processing systems, detect and document faults, execute recovery procedures to restore mission capability, work rotating 12-hour shifts and weekends, and support ingest/processing/dissemination workflows. Requires strong communication, analytical skills, UNIX/Solaris familiarity, and an active TS/SCI with CI Poly.

Manage lifecycle of on-prem and cloud infrastructure including servers, Microsoft SQL databases, AD, DNS, SAN, backups, monitoring, and cloud accounts. Deploy, maintain, automate (PowerShell, Ansible, Terraform), support production/test environments, document systems, and assist with acquisitions and disaster recovery. Provide on-call support.

Diagnose and troubleshoot advanced server, networking, virtualization, email, and cloud services; manage escalations with internal teams and vendors; administer Windows Server, Active Directory, Group Policy, file services (DFS, Folder Redirection, OneDrive), DHCP/DNS, Exchange/O365 and Cisco networking; maintain Hyper-V/VMware hosts; automate tasks using PowerShell, batch, and Kaseya scripting.

Perform senior-level network and systems administration across Windows, Linux, and Mac platforms. Plan, implement, secure and monitor on-premise and cloud infrastructure; administer backups and disaster recovery; troubleshoot servers, networks, and applications; manage projects, vendor relationships, policies, and IT budgets; provide user support and documentation while maintaining compliance (PCI DSS) and security best practices.

Manage and secure hybrid Windows Server and Azure infrastructure. Duties include on-prem Windows administration, Azure resource deployment and hybrid integration, automation with PowerShell/ARM, monitoring, incident resolution, security and compliance, and supporting migrations and DR.

Support NERC CIP compliance and maintain Windows and Linux platforms for the Energy Management System (EMS). Perform configuration management, security controls testing, change control, disaster recovery, malware prevention, access control, and troubleshooting. Automate tasks, support audits and investigations, write technical/reference documentation, provide IT technical support, and assist CIP V5 implementation. Participate in on-call rotation.

The GxP Laboratory Systems Administrator supports and manages laboratory systems within GxP environments, ensuring compliance and system functionality across various departments. Responsibilities include application administration, issue resolution, documentation for audits, and collaboration with internal teams and external partners.