operational services GmbH & Co. KG | Germany | 50xxx, 51xxx Köln | Permanent position | Full time / Home office | Published since: 23.01.2026 on stepstone.de
Senior 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. STELLENKENNZIFFER: 992025096VOH
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Your tasks • Your profile • What we offer
Projecting and implementation Start-up of Windows Server and Clients Problem and error analysis, problem solution also in complex systems or System landscapes
Creation of decision templates and concepts
Design/ Introduction of supporting tools and workflows
Project complex orders and manage their execution including the disposition of resources and suppliers
Conception, introduction and monitoring of measures to ensure service levels or Customer satisfaction
Creation of strategic concepts for area organisation
Participation in projects of contracting authorities
Master or Diploma with adequate professional experience or comparable knowledge and skills
At least seven years of professional experience, of which at least five years in IT administration with corresponding complexity
Finded experiences with Windows Server operating system and associated basic services (e.g. DHCP or DNS)
Experiences OMNISSA WorkspaceONE and Windows Client operating system (FAT Clients, Horizon VDI Management, IGEL Thin Clients) as well as Samsung Mobile devices desirable
Experience in operation or Support for end-users such as printers or scanners (manufacturer HP)
Professional, trustworthy and empathic appearance at management level
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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