IT Network and System Administrator | IT Netzwerk- und Systemadministrator (m/w/d/kA)

concentrade GmbH

Dortmund, Nordrhein-Westfalen, Deutschland
Published Nov 25, 2025
Full-time
Permanent

Job Summary

This role is for an experienced IT Network and System Administrator specializing in ensuring secure, high-availability IT operations within the critical field of cybersecurity. The administrator will be responsible for the full lifecycle management of Windows and Linux servers, both physical and virtualized environments, including installation, configuration, maintenance, and optimization of Active Directory and Azure services. Key daily tasks involve monitoring the IT infrastructure, troubleshooting complex issues, managing internal client systems and telecommunications, and executing IT projects. Candidates must bring several years of relevant experience, deep knowledge of Windows services (SCCM, Intune, DHCP, DNS), PowerShell scripting, and database administration. The position offers a secure, permanent contract and continuous professional development in a future-oriented industry focusing on IT security, fostering a work environment with flat hierarchies and flexible working options.

Required Skills

Education

Completed vocational training in IT (e.g., IT Specialist System Integration) or comparable qualification.

Experience

  • Several years of professional experience in administering Windows and Linux servers
  • Practical experience with Microsoft Active Directory and Azure
  • Experience with virtualization technologies (e.g., VMware, Hyper-V)
  • In-depth knowledge of database configuration and maintenance

Languages

Not specified

Additional

  • Permanent employment contract. Must be willing to work in Dortmund.