IT Systems Administrator (Central Services) | IT-Systemtechniker/in (m/w/d) / Administration zentraler Systemdi...

KRZN GmbH

Kamp-Lintfort, Nordrhein-Westfalen, Deutschland
Published Oct 20, 2025
Full-time
Fixed-term

Job Summary

This role is for a qualified IT Systems Administrator specializing in the central system services (Mail, DNS, and Proxy) environment for KRZN GmbH, a major municipal IT service provider. Key responsibilities include participating in the planning, configuration, and administration of the central Mail environment, as well as managing the central DNS and Proxy servers. Candidates must demonstrate strong analytical capabilities and possess fundamental expertise in Linux system administration, including configuring Postfix, Dovecot, and spam filtering solutions (ideally SpamAssassin or RSpamD). The position requires proficiency in Bash scripting and managing SSL/TLS certificates. Success requires a solution-oriented, independent, and service-focused approach. This is an attractive, full-time position (39 hours/week), initially fixed for 18 months with the option for permanent takeover, offering flexible hours and extensive professional development opportunities.

Required Skills

Education

Completed vocational training as an IT Specialist for System Integration, or comparable professional qualification, knowledge, and experience.

Experience

  • Professional experience in Linux system administration
  • Experience with configuration of Postfix and Dovecot
  • Experience with configuration of SpamAssassin or RSpamD
  • Experience operating DNS and Proxy systems

Languages

German (Fluent)

Additional

  • Willingness to work on-site at Kamp-Lintfort (with optional home office); Role is full-time (39 hours/week) and initially fixed-term for 18 months.