Top Systems Administrator Jobs

The Senior System Administrator will manage Windows-based systems, oversee Active Directory and network services, provide technical support, and collaborate on integrations, all while ensuring system performance and high availability.

Lead systems administrator responsible for installing, configuring, patching, and maintaining Windows/Linux servers, SAN/NAS, VMware virtualization, Active Directory, and backup/DR (Veeam). Serves as technical lead and primary contact for infrastructure services supporting DoD/Army C4ISR, ensuring STIG-hardened environments, contingency mission-essential support, and enterprise tool management (SCCM, SolarWinds).

Own and administer HubSpot and the GTM tech stack (Fathom, Outreach, LinkedIn Sales Navigator), manage integrations and data hygiene, design workflows and reporting, support stakeholders across Sales/Marketing/CS, resolve integration and automation issues, document standards, train users, and evaluate new GTM tools to ensure a connected, reliable revenue ecosystem.

The Windows Systems Administrator will manage server builds, perform patching, troubleshoot issues, and maintain documentation while ensuring strong communication with users.

Lead implementation, administration, and continuous improvement of an enterprise-wide Safety Management System (SMS) across geographically dispersed locations. Manage SMS policies, risk assessments, audits, training, metrics, and compliance mapping to ISO and occupational health standards. Serve as SMS SME, drive adoption, report to leadership, and coordinate cross-functional safety activities.

The Systems Administrator III/IV will handle system administration tasks, manage virtual environments, support Active Directory, maintain security, and oversee backups. This role involves physical server maintenance and project management related to infrastructure improvements.

The Systems Administrator I supports end-user hardware and software, troubleshoots systems and peripherals, processes incidents, and ensures compliance with service metrics while providing excellent customer service.

Administers hardware, operating systems, servers, network file systems, account services, workstation imaging, software deployment, security updates, backups, and disaster recovery for a film and video school. Provides technical support for classrooms, labs, and server infrastructure; monitors network performance; maintains documentation, inventories, and ticketing resources; troubleshoots hardware and software; coordinates with other administrators and central IT; and recommends system improvements.

The Principal IT Systems Administrator oversees IT systems, leading complex initiatives, managing infrastructures and endpoints, enhancing security compliance, and ensuring incident management and documentation standards are met.

Administers and improves the Computer Science department’s servers, workstations, storage, networking, operating systems, security, backups, and HPC infrastructure. Leads upgrades, migrations, infrastructure projects, monitoring, incident response, disaster recovery, and system documentation. Supports faculty, researchers, students, and staff; manages DNS, DHCP, authentication, access control, firewalls, and network services. Provides purchasing recommendations, technical consulting, endpoint and audiovisual support, mentoring, and on-call coverage.

Serve as first-line NOC systems administrator supporting 24/7 operations: monitor and triage alerts, execute patching, diagnose/repair hardware, maintain Linux and Microsoft configurations, provide customer-facing technical support, and create/improve SOPs and runbooks.

Serve as first-line NOC systems administrator supporting 24/7 operations: monitor infrastructure, triage and mitigate incidents, execute patch cycles, diagnose/repair hardware, maintain Linux and Microsoft configurations, support customers, and create/update SOPs and runbooks.

The MS Enclave Administrator will manage Azure environments, troubleshoot issues, maintain systems, and lead projects while collaborating with Microsoft teams and customers.

Manage and maintain enterprise IT infrastructure including Windows/Linux servers, Active Directory, Exchange/O365, virtualization, backups, and VPN/MDM. Perform patching, monitoring, Tier 2 troubleshooting, account provisioning, documentation, and support onboarding/offboarding. Assist with projects, ensure security policy compliance, and provide remote user support.

Administer and harden Windows Server environments across on-prem, VMware, and cloud (Azure/AWS/GCP). Manage AD/DNS/DHCP/Group Policy, automate with PowerShell and Ansible, monitor with Azure tools, remediate vulnerabilities, support migrations, provide Tier 3 and 24x7 operations, and document changes using ITSM and DevSecOps practices.

The CRM Systems Administrator manages CRM systems, supports users, develops workflows and automation, and ensures system improvements and documentation.

Manage and secure classified Windows Server and virtualization environments (VMware/Hyper-V/Nutanix). Administer enterprise applications, storage, Active Directory, DNS/DHCP/GPO, and privileged access (RSA, CyberArk). Apply patches, run vulnerability scans (Nessus), remediate issues, troubleshoot infrastructure, process classified account requests per DoD/NISPOM, and support continuous modernization and Information Assurance in a high-security environment.

Design, implement, and maintain servers, storage, and networks supporting the U.S. Space Force Satellite Control Network. Create system and network designs, ROM/BOM/BOE, installation and rollback plans, troubleshoot Windows and Linux systems, coordinate with cybersecurity and engineering teams, support installations (~25% travel), and assist with documentation and logistics support.

Support, maintain, and secure classified and unclassified enterprise systems. Install and manage physical and virtual infrastructure (VMware ESXi/vSphere/vCenter/Horizon), Nutanix/Dell storage, VDI and zero-client environments, build/deploy images, apply patches, perform backups/disaster recovery, and ensure cybersecurity compliance and accreditation.

Administers Windows servers and clients across classified and unclassified Navy networks at PMRF. Manages Active Directory, DNS, DHCP, GPOs, virtualization, imaging, patching, hardening, vulnerability remediation, backups, and disaster recovery. Supports RMF controls, DISA STIG compliance, ATO packages, audits, incident response, and system recovery. Develops PowerShell automation, maintains documentation and configuration baselines, participates in change boards, and provides periodic at-sea and field support.

Administer and maintain Esri ArcGIS Enterprise environments across development, test, and production. Responsibilities include platform installation, configuration, security, user access, geodatabases, monitoring, troubleshooting, patching, upgrades, backups, disaster recovery, licensing, migrations, documentation, and support for mission-critical geospatial workflows. The role collaborates with GIS analysts, cartographers, and IT staff and requires an active Top Secret clearance plus a Counterintelligence polygraph.

Manages endpoint devices, identities, access controls, security monitoring, and lifecycle processes across Windows, ChromeOS, and mobile platforms. Administers Intune, Entra ID, Autopilot, Microsoft 365, and shared-device environments; implements MFA, Conditional Access, endpoint protection, and secure baselines. Provides Tier 1/2 support and escalation assistance, develops automation, maintains documentation, coordinates vendors, and supports backup, disaster recovery, compliance, and technical projects.

Lead Salesforce administration and business systems strategy across Sales Cloud, Service Cloud, and connected go-to-market systems. Responsibilities include complex configuration, declarative development, security, maintenance, integrations, data flow management, process optimization, documentation, and configuration governance. The role also owns roadmaps for key business systems, prioritizes enhancements, partners with cross-functional stakeholders, and implements solutions that improve efficiency and reduce manual work.

Plans, implements, administers, and optimizes county-wide servers, networks, applications, identity systems, storage, and Microsoft 365. Troubleshoots complex infrastructure and application issues, supports disaster recovery, monitors performance, maintains documentation, advises on information security compliance, leads technology projects, performs database administration, supports remote connectivity, and mentors junior IT staff. Participates in 24x7 on-call coverage.

Administer and improve Docebo and related learning technologies supporting sales enablement, customer training, partner education, onboarding, and certification. Responsibilities include platform configuration, governance, permissions, integrations, SSO, SAML, SCIM provisioning, troubleshooting, vendor coordination, reporting, analytics, and AI-enabled learning technology evaluation. The role translates business requirements into scalable solutions, supports global stakeholders, and ensures platform stability, security, performance, data integrity, and user satisfaction.