CareerPlan

IT-Systemadministrator (m/w/d)

Hannover, NIEDERSACHSENFull-time2026-09-22 → 2026-11-10

Core

Administer, operate, and monitor a virtual server landscape and Windows/Microsoft 365 environments to ensure high availability and performance for events and internal operations.

Role type

Senior System Administrator (Windows/VMware/Proxmox)

Builds

Virtualized server infrastructure, Windows Server environments, Microsoft 365/Exchange/Teams setups, backup and security solutions, and mobile device management fleets.

Domain

IT Infrastructure / System Administration

Required skills

Windows Server administration, Active Directory, Group Policy, DNS, DHCP, VMware vSphere, Proxmox VE, Microsoft 365, Exchange, Entra ID, Veeam Backup & Replication, Matrix42 Empirum, macOS/iOS device management, backup and security solutions, automation and standardization of administrative processes

Preferred skills

Zabbix, Matrix42 EgoSecure

Technologies

VMware vSphere, Proxmox VE, Windows Server, Active Directory, Microsoft 365, Exchange, Entra ID, Veeam Backup & Replication, Matrix42 Empirum, Matrix42 EgoSecure, Silverback, Zabbix

Responsibilities

Administer and monitor virtual server landscape (VMware vSphere, Proxmox VE), manage Windows Server environment (AD, GPO, DNS, DHCP), maintain Mail and Microsoft 365 environment (Exchange, Entra ID, Office 365, Teams), plan and execute lifecycle management, updates, and migrations for servers and VMs, develop and maintain backup, monitoring, and security solutions, manage client and mobile device management (Windows and Apple systems), develop authorization and security concepts, drive automation and standardization of administrative processes, provide 1st and 2nd-level support, participate in IT projects and process optimization, conduct internal training, participate in on-call duty

Seniority

Mid-level, hands-on IC