Senior Windows Systems Administrator – Enterprise IT

Cognizant; Helsinki; On-site; EUR 70,000 - 95,000; Full time

Job summary

Cognizant Finland is seeking a seasoned Windows Administrator to join the Infrastructure and Digital Workplace Services team. The role focuses on Windows Server, AD, and core infrastructure, delivering reliable, secure operations and proactive patching in a large enterprise context.

You will oversee SCCM/WSUS, virtualization in VMware ESXi and Hyper-V, and automate tasks with PowerShell, while aligning with ITSM processes.

Qualifications

• 7-10+ years Windows Administrator in enterprise environments.
• Strong knowledge of Windows Server, AD, DNS, DHCP, GPO, IIS, SCCM, WSUS, PowerShell.
• Experience VMware ESXi/vSphere and Hyper-V.
• Backup and disaster recovery experience.
• Ability to work within ITSM controls (change, incident, problem, security, audit).
• Owns issues, with analytical troubleshooting and good documentation.

Responsibilities

• Install, configure, patch, and maintain Windows Server platforms.
• Administer AD, DNS, DHCP, GPO, IIS, certificates, and core Windows services.
• Manage SCCM/WSUS patching, remediation, compliance reporting.
• Support VMware ESXi and Hyper-V workloads, capacity and availability checks.
• Automate recurring tasks with PowerShell and orchestration tools.
• Perform backup, recovery, DR, incident, problem, and change activities via ITSM.
• Troubleshoot L2/L3 issues, contribute to root cause analysis, maintain SOPs/runbooks.
• Participate in on-call or 24x7 production support.

Skills

Windows Server & AD

DNS

DHCP

Group Policy & IIS

PowerShell

SCCM/WSUS

VMware ESXi / vSphere

Hyper-V

Backup & DR

ITSM / Change mgmt

Ownership & comms

Tools

VMware ESXi

vSphere

Hyper-V

SCCM

WSUS

PowerShell

Job description

Cognizant Finland is seeking a seasoned Windows Administrator to join the Infrastructure and Digital Workplace Services team. The role focuses on Windows Server, AD, and core infrastructure, delivering reliable, secure operations and proactive patching in a large enterprise context.

You will oversee SCCM/WSUS, virtualization in VMware ESXi and Hyper-V, and automate tasks with PowerShell, while aligning with ITSM processes.