IT Systems Administrator

Job Description

Job Summary

The IT Systems Administrator is responsible for the availability, performance, security, and maintenance of on-premises and cloud systems. This role manages servers, storage, networks, and core services (e.g., Active Directory, , email), while providing Tier 2/3 support, automating routine tasks, and ensuring compliance with organizational and regulatory standards.

Key Responsibilities

•\tAdminister, monitor, and maintain Windows/Linux servers, virtualization platforms and cloud services (e.g., Microsoft 365/Azure).

•\tManage and access (Active Directory, Azure AD/Entra ID), group policies, single sign-on (SSO), and MFA.

•\tMaintain core infrastructure: DNS, DHCP, file/print services, certificate services, IIS/Apache, and backup/restore systems.

•\tImplement patching, configuration management, and system hardening; maintain OS and application currency.

•\tMonitor capacity, performance, and availability; remediate incidents and root causes; document post-incident reviews.

•\tAdminister networking fundamentals: VLANs, routing, firewalls, VPN, Wi‑Fi; collaborate with network engineers on changes.

•\tOwn backup, disaster recovery, and business continuity plans; perform regular tests and validate RPO/RTO targets.

•\tSecure systems in alignment with best practices; manage endpoint protection, EDR/XDR, logging, SIEM integrations, and least‑privilege.

•\tManage licenses, asset inventory, and lifecycle (procurement, build, deployment, decommission).

•\tCreate and maintain documentation: diagrams, runbooks, SOPs, and knowledge base articles.

•\tProvide Tier 2/3 support, mentor service desk staff, and coordinate vendor escalations.

•\tParticipate in change management; plan and execute maintenance windows and upgrades.

•\tContribute to audits & compliance and remediate findings.

•\tSupport project delivery: requirements, design, testing, cutover, and post‑implementation validation.

Qualifications

Education:

•\tAssociate or Bachelor’s degree in Information Technology, Computer Science, or related field ().

•\tMicrosoft Certified: Windows Server Hybrid Administrator Associate; Microsoft 365/Azure Administrator Associate.

•\tCompTIA Server+, Network+, Security+; ITIL Foundation.

•\tVMware VCP, AWS SysOps Administrator, or similar platform certifications.

Experience:

•\t3–5+ years administering Windows/Linux servers, virtualization, storage, and core services.

•\tHands‑on experience with Microsoft 365/Azure (Exchange Online, SharePoint/OneDrive, Intune/Endpoint Manager).

•\tPractical knowledge of networking (TCP/IP, DNS, DHCP, VLANs, routing, VPNs, firewalls).

•\tScripting/automation experience (PowerShell and/or Bash).

•\tWorking knowledge of security controls, hardening benchmarks, patching, backup/restore, and DR/BCP.

Skills & Competencies

•\tStrong troubleshooting and root‑cause analysis; ability to interpret logs and performance metrics.

•\tExcellent documentation, communication, and stakeholder management skills.

•\tAbility to prioritize, manage concurrent projects, and operate during maintenance windows.

•\tSecurity‑first mindset with attention to least privilege, segmentation, and monitoring.

Tools/Technology Stack

•\tWindows Server, Linux (Ubuntu/CentOS/RHEL), Active Directory, Azure AD/Entra ID.

•\tVMware vSphere/ESXi or Microsoft Hyper‑V; SAN/NAS storage.

•\tMicrosoft 365 (Exchange Online, SharePoint, OneDrive), Intune/Endpoint Manager.

•\tPowerShell, Bash, Ansible; configuration and patch management tools (e.g., WSUS/SCCM).

•\tMonitoring/alerting (e.g., Nagios, Zabbix, PRTG, Azure Monitor), SIEM (e.g., Splunk, Sentinel).

•\tBackup solutions (e.g., Veeam, Commvault), ticketing (ServiceNow/Jira).

Work Environment

•\tStandard business hours with occasional after-hours support for critical issues

•\tOffice-based with remote support

•\tAbility to travel domestically

•\tAbility to lift/move equipment up to 25–40 lbs; occasional travel to sites or data centers.