Top IT Systems Administrator Jobs

Administers network and server infrastructure at a manufacturing facility, including Cisco switches, wireless networks, Windows Server, Active Directory, DNS, DHCP, firewalls, VPNs, backups, and enterprise applications. Troubleshoots infrastructure and end-user issues, maintains documentation, supports upgrades and vendors, assists with security and disaster recovery activities, and provides occasional on-call support.

Senior systems administrator responsible for secure, classified IT environments: configure and maintain Lab-in-a-Box, VMware, backups, endpoint protection, vulnerability scanning, Active Directory/GPOs, Splunk logging, and ensure STIG/RMF/NISPOM compliance. Lead data spill response, system sanitization, documentation, and audit readiness while collaborating with security stakeholders in a 100% onsite classified area.

Administer classified, air-gapped IT systems and lab environments in a 100% onsite closed area. Responsibilities include Active Directory, VMware, Veeam, Trellix ePO, Splunk, Nessus, Lab-in-a-Box environments, vulnerability remediation, data spill response, secure wiping, domain controller maintenance, STIG/RMF compliance, documentation, and audit readiness.

Administer enterprise IT systems and SaaS platforms while deploying and governing AI tools, MCP servers, and agent infrastructure. Manage service accounts, credentials, permissions, integrations, onboarding and offboarding, automation, documentation, and technical debt. Serve as an escalation point for complex ITSM issues, collaborate across Security, People Ops, and Engineering, and mentor IT Support staff on processes and troubleshooting.

Administers Orange EV’s Microsoft-based IT environment, including Windows Server, Active Directory, Entra ID, Microsoft 365, virtualization, endpoints, and network infrastructure. Responsibilities include identity and access management, PowerShell automation, monitoring, backups, disaster recovery, incident response, documentation, compliance support, and vendor coordination. The role is fully on-site and also manages IT project schedules, budgets, milestones, and deliverables.

Administer endpoint, server, directory, network, cloud, and collaboration environments. Manage Intune, Windows and macOS systems, Active Directory, Azure AD, DNS, ADFS, Office 365, Exchange, SharePoint, VPNs, firewalls, and Windows Server. Troubleshoot infrastructure and access issues, coordinate with ISPs, support updates and backups, and track requests using Jira Service Management and Atlassian tools.

Administers Windows and Linux servers, networks, cloud platforms, identity services, virtualization, backups, endpoints, and enterprise applications. Provides Tier II/III support, manages security controls and vulnerability remediation, monitors infrastructure performance, maintains documentation, supports compliance requirements, and participates in disaster recovery, maintenance, and on-call activities. The role also supports onboarding, asset management, continuous improvement initiatives, and limited travel.

Administers and secures servers, networks, storage, operating systems, cloud systems, backups, databases, telephony, and end-user devices. Provides help desk support, troubleshoots hardware and software, performs installations and maintenance, manages Microsoft environments, develops PowerShell and Power Automate automation, and creates technical documentation. Participates in IT projects, supports software and hardware rollouts, maintains system security, and participates in an on-call rotation, including occasional evening and weekend work.

Provides Tier 1 and Tier 2 technical support for internal users and managed-services clients. Responsibilities include troubleshooting endpoints, Microsoft 365, identity systems, networks, servers, mobile devices, meeting-room technology, and building-related IT systems. The role manages tickets through resolution, monitors alerts, coordinates vendors and escalations, documents procedures, delivers customer service, and participates in on-call rotations.

Administer and maintain IT systems, manage user accounts and permissions, resolve complex technical issues, support business continuity planning, and lead assigned projects. Coordinate workflow, update department processes and knowledgebase, perform service pack installs and health checks, and assist lines of business with escalated customer issues.

Administers and maintains IT platforms for more than 200 users, providing endpoint deployment, lifecycle management, Tier 1 support, troubleshooting, monitoring, and remote workforce assistance. Supports Microsoft 365 GCC, Active Directory, business applications, and endpoint security tools. Documents systems, maintains policies, recommends technology improvements, assists with platform modernization, and leads endpoint-focused projects while collaborating with IT, security, suppliers, and employees.

Supports enterprise servers and infrastructure through monitoring, administration, troubleshooting, patching, backups, hardware deployments, and performance management. Maintains Active Directory, Group Policy, Exchange, documentation, and system configurations. Responds to IT tickets, participates in maintenance and infrastructure projects, supports financial center infrastructure, and joins an on-call rotation after training. The role is initially on-site before transitioning to a hybrid schedule.

Supports and administers business-critical departmental applications in cloud and on-premise environments. Responsibilities include system configuration, maintenance, upgrades, monitoring, integrations, authentication, security, backups, disaster recovery, programming, testing, documentation, reporting, user training, change management, and stakeholder communication. The role also mentors team members and promotes continuous system and process improvements.

Serve as a technical leader and SME for Atlassian applications, designing and maintaining secure integrations across SaaS, CRM, ERP, billing, and internal systems. Build REST, GraphQL, and webhook integrations; automate workflows; implement monitoring and alerting; manage data transformations; document solutions; and support complex Jira and Confluence configurations and upgrades in clustered Linux environments. Partner with stakeholders, troubleshoot issues, lead projects, and mentor team members.

Serves as the company’s first dedicated IT hire, providing helpdesk support, device provisioning, endpoint management, systems and network administration, identity and access management, backups, and disaster recovery. Establishes baseline information security controls, supports NIST 800-171/CMMC compliance, responds to incidents, manages IT vendors, handles onboarding and offboarding, and documents procedures across Austin and Ballinger locations.

Administer and support IT systems in an automotive manufacturing environment, including MES and ERP administration, network and device monitoring, firewalls and cybersecurity systems. Manage Microsoft Active Directory, Cisco infrastructure, and VMware virtualization. Ensure reliable system operations and collaborate across teams to support production environments.

Manages statewide IT infrastructure, including Windows and Linux servers, SAN storage, cloud environments, hardware, software, and security systems. Designs and implements system architecture, installations, configurations, backups, monitoring, maintenance, and decommissioning. Troubleshoots complex issues, maintains secure configurations, supports vulnerability assessments and penetration testing, develops server-management strategies, trains staff, and recommends infrastructure policies and architecture to senior management.

Supports company infrastructure, user accounts, devices, servers, networks, cloud systems, endpoint security, patching, backups, and access controls. Provides frontline help desk assistance for account, printer, hardware, and connectivity issues; maintains POS configurations; documents incidents, runbooks, and knowledge-base materials; and delivers basic technology training. Escalates complex infrastructure, security, ERP, and POS issues to senior staff.

Administer Azure, Microsoft 365, Windows Server, identity services, Cisco Meraki networking, and multi-site branch infrastructure. Provide Tier 2 and Tier 3 troubleshooting, security and patching, monitoring, documentation, automation, vendor coordination, and infrastructure project ownership. Lead branch openings, relocations, expansions, closures, and technology refreshes while maintaining operational standards and managing changes through implementation and handoff.

Administers Microsoft 365, Intune, Entra ID, Azure, Windows Server, Active Directory, business applications, endpoints, and infrastructure. Maintains cybersecurity controls, backups, disaster recovery, system availability, licensing, documentation, and compliance. Provides advanced technical support, coordinates vendors and integrations, responds to incidents, supports technology projects, and recommends infrastructure improvements. The role requires on-call availability and proximity to Ithaca, New York.

Owns IT systems administration and security operations for a fully remote workforce. Responsibilities include managing Microsoft 365 and Google Workspace, endpoint and identity platforms, security tools, access controls, threat monitoring, incident response, vulnerability management, compliance evidence, disaster recovery, vendor relationships, reporting, and operational roadmaps.

Provides internal Tier 1 IT support, manages employee devices, accounts, software, onboarding, offboarding, and technology inventory. Administers SharePoint, Monday.com, Deltek Ajera, workflows, reports, and dashboards. Supports cybersecurity controls, CMMC compliance, access reviews, evidence collection, incident reporting, and audit readiness. Coordinates with external IT providers and vendors while improving business systems, automations, documentation, and employee technology education.

Administers and supports Windows-based server, application, SAN, and virtual environments. Configures, upgrades, patches, documents, and troubleshoots systems; deploys VMware environments; maintains IT asset inventories; evaluates system performance and inefficiencies; coordinates issue resolution with users, vendors, property leaders, and IT teams; and provides off-hours support as needed.

Maintains and supports operating systems, servers, virtualization environments, networks, and assigned applications. Responsibilities include system configuration, software and hardware upgrades, repairs, automation, security permissions, backup and SAN administration, desktop and helpdesk support, troubleshooting connectivity issues, and customer communication. The role also contributes to continuous improvement initiatives and may provide occasional travel support.

Maintain, configure, and secure enterprise and air-gapped systems onsite. Provide Tier II support, install and patch servers and desktops, manage virtual machines, administer Red Hat Linux, monitor systems, document procedures, escalate issues, and ensure compliance with DoD security standards and organizational policies.