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System Administrator (f/m/d)

| UKR-SA-AO | IT administration | Energy | Aachen | Oldenburg

We are KISTERS: a medium-sized IT company with headquarters in Aachen/Germany and numerous international sister companies. Environmental data management is the common core of almost all business areas - and our passion since our founding in 1963. Today, we develop, among other things, software solutions for sustainable resource management of energy, water and air, for environmental protection and safety, for 3D viewing as well as sensors for environmental monitoring. The responsible use of our resources is a matter of course for us and, moreover, the motivation behind our services and offers. Fairness, diversity and mutual respect are at the heart of our corporate culture. As a family business with an international orientation, we consciously cultivate this mindset.

At our locations in Aachen and Oldenburg we are recruiting several

System Administrators (f/m/d)


Your Tasks

  • Administration of Active Directory and O365 environments, Citrix server farms, virtualisation environments (VMware vSphere, Hyper-V, ...) or network environments (switches, routers, firewalls)
  • Setting up and operating hybrid, highly available landscapes (on-premise, Azure, AWS, others if necessary)
  • Implementation and continuous improvement of IT security in KISTERS’ cloud solutions for cloud providers Azure and AWS
  • Implementation and further development of IT vulnerability scans
  • Error analyses in the area of hardware and software
  • Maintenance, extension or creation of scripts, automation
  • Support, assumption of on-call duties for the elimination of malfunctions outside regular operating hours
  • Maintenance of company-specific systems including documentation and participation in further development

Your Qualification

  • Completed university studies, completed training as an IT specialist (f/m/d) in system integration or comparable qualification with relevant professional experience (ideally Blue Card in IT)
  • Very good knowledge of written and spoken English, knowledge of German required 
  • Confident handling of current IT infrastructure, for example Microsoft Windows Server, Linux, Microsoft Active Directory, Microsoft O365, Microsoft PowerShell, virtualisation with VMware vSphere
  • Experience in security of systems, applications and networks
  • Programming knowledge is an advantage
  • Good communication skills, commitment, team spirit and flexibility
  • Good analytical skills, structured and solution-oriented way of working  
  • Creativity and curiosity as well as the ability to learn and apply new concepts quickly

Our Offer

  • Support in finding accommodation, language courses and integration for you and your family
  • A wide range of development opportunities in a future-oriented, innovative company, personal and professional training
  • An international working environment and an open, friendly corporate culture
  • Good workplace equipment
  • Performance-related compensation 
  • Flexible working hours and autonomous work

Please send your application (email preferred) to:

KISTERS AG, z.H. Frau Ina Donath
Pascalstraße 8+10 · D-52076 Aachen
+49 2408 9385-0 · jobs(at)

Contact person