operational services GmbH & Co. KG | Germany | 50xxx, 51xxx Köln | Permanent position | Full time | Published since: 25.02.2026 on stepstone.de
Administrator Windows Server and Client Support (m/f/d)
operational services (OS) is one of the leading ICT service providers in the German market and is considered to be the backbone of digitalization. It is the leading agile unit of the Telekom Group in order to continuously accelerate the digital transformation in the German middle class. With over 1,000 highly qualified employees, it develops and operates state-of-the-art information systems, manages private & public cloud platforms, secures long-term 24/7 system support and the availability of critical operating processes. COURT: 2026023VOH
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Your tasks • Your profile • What we offer
The administrator (m/w/d) is responsible for operating servers and clients based on Windows
Projecting and implementation Start-up of Windows Server and Clients
problem and error analysis, problem solution also in complex systems or System landscapes
Participation in the creation of policy templates and concepts
Install and maintain tools
Design and Introduction of Supporting Tools
Conception, introduction and monitoring of measures to ensure serivce levels or Customer satisfaction
Maintenance and updating of documentation
Participation in projects of contracting authorities
Master or Diploma with adequate professional experience or comparable knowledge and skills
At least five years of professional experience, of which at least three years in IT administration
Finded experiences with Windows Server operating system and associated basic services (e.g. DHCP or DNS) Experiences with OMNISSA Horizon Platform and Windows Client operating system (FAT Clients, Horizon VDI Management, IGEL Thin Clients) and Samsung Mobile devices desirable
Very good technical expertise in the targeted field of work and good knowledge of adjacent technologies
Very good knowledge of English as well as knowledge of German in word and writing
Attractive salary package with participation 37 hours/week with working time accounts Employer-funded training and certification Another plus is our bicycle leasing, 30 days holiday, subsidised Germany ticket, employee-funded retirement provision, asset-effective services, group accident insurance for work and leisure as well as employee conditions for many products from the Deutsche Telekom Group. .
Location
 | operational services GmbH & Co. KG | |
| Köln | ||
| Germany |
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