Systems Administrator (Mid/Senior)

Quick Facts

• Level: Mid/Senior

• Focus: Windows/AD, Microsoft 365 identity & messaging, VMware virtualization, backup/recovery, incident troubleshooting, automation

Description

You will maintain and develop production IT infrastructure including Windows Server and Active Directory (GPO, DNS, DHCP, permissions and file services), Microsoft 365 (Entra ID, Exchange Online) and device/security management (Intune, Microsoft Defender). You will administer VMware vSphere and support HCI infrastructure based on VMware vSAN, ensuring availability, performance, and capacity. You will manage backups with Veeam (RPO/RTO), investigate escalated incidents, automate administration with PowerShell, and plan migrations and changes.

Responsibilities

• Maintain and develop Windows Server and Active Directory (GPO, DNS, DHCP, permissions, file services)

• Administer Microsoft 365, Entra ID, Exchange Online; manage devices and security with Intune and Microsoft Defender

• Administer VMware vSphere and contribute to VMware vSAN-based HCI development (availability, performance, capacity)

• Maintain Veeam backups, monitor backup copies, and perform restore tests aligned to RPO/RTO

• Diagnose escalated incidents from the Helpdesk using log analysis and implement measures to prevent recurrence

• Automate tasks with PowerShell; update and harden configurations and deploy security measures

• Plan changes and migrations, prepare tests and rollback plans, document solutions, and coordinate with vendors

Requirements

• At least 3 years of experience in administering production environments; independently solve incidents and implement changes

• Very good knowledge of Windows Server and Active Directory: GPO, DNS, DHCP, permissions, troubleshooting authentication and replication

• Practical experience with Microsoft 365, Entra ID, Exchange Online; deploying Intune policies and Microsoft Defender protection mechanisms

• Ability to administer VMware vSphere: ESXi, vCenter, virtual machines, and HA mechanisms

• Experience with Veeam with real restores of data/services; understanding retention, backup isolation, and snapshot vs backup

• Ability to write and maintain PowerShell scripts; least-privilege approach, MFA, and patch management

• Understanding system dependencies on TCP/IP (DNS, routing) and firewall rules; ability to work with network administrators during diagnostics

• Independence, documentation, knowledge sharing; English to use documentation and submit support requests

Benefits

• Stable employment under an employment contract at a public university

• Opportunity to propose improvements and lead implementations within your scope in cooperation with the IT service team

• Access to training and knowledge exchange; ability to apply for development travel within Erasmus+

• Comprehensive benefits package including vacation support, holiday benefits, private medical care access, sports program, and use of the PG Czarlina vacation facility on university rules