Prime21
Weinfelden TG oder Landquart GR
Senior System Engineer Microsoft Infrastructure
- 14 August 2026
- 100%
- Permanent position
- German (Fluent), English (Intermediate)
- Weinfelden TG oder Landquart GR
About the job
Are you at home in system engineering and want not only to operate a demanding enterprise infrastructure but also to technically further develop, modernise and actively shape it?
We at Prime21 are looking for an experienced Senior System Engineer with a focus on Microsoft infrastructures, Identity & Access Management and IT security for esolva ag at the Weinfelden TG or Landquart GR location.
esolva is a leading Swiss service provider for energy supply companies, industrial enterprises and private customers. Accordingly, the requirements for stability, availability and security of the IT systems are very high. In this position, you take on real technical responsibility: from engineering and architecture to migrations and automation to the sustainable resolution of complex 3rd-level problems.
We are explicitly not looking for a classic supporter or workplace specialist, but an experienced system engineer who understands and wants to further develop complex infrastructures.
We at Prime21 are looking for an experienced Senior System Engineer with a focus on Microsoft infrastructures, Identity & Access Management and IT security for esolva ag at the Weinfelden TG or Landquart GR location.
esolva is a leading Swiss service provider for energy supply companies, industrial enterprises and private customers. Accordingly, the requirements for stability, availability and security of the IT systems are very high. In this position, you take on real technical responsibility: from engineering and architecture to migrations and automation to the sustainable resolution of complex 3rd-level problems.
We are explicitly not looking for a classic supporter or workplace specialist, but an experienced system engineer who understands and wants to further develop complex infrastructures.
Your Tasks
- Engineering, operation and continuous further development of the Microsoft-based enterprise infrastructure
- Technical responsibility for Windows Server, Microsoft 365 as well as Identity & Access Management
- Analysis and sustainable resolution of complex 3rd-level incidents including root cause analysis
- Planning and technical management of changes, migrations and infrastructure modernisations
- Evaluation of new technologies and assessment regarding security, benefits, risks, dependencies and integration effort
- Automation and standardisation of recurring tasks and operational processes with PowerShell and GitLab
- Performance optimisation as well as ensuring stable and secure operation
- Creation and further development of solution concepts, system architectures, operational documentation and technical decision bases
- Technical responsibility for work packages in projects and subprojects - from conception through implementation and testing to handover to operations
- Shaping technical standards, security requirements, operating models and lifecycle decisions
- Collaboration and coordination with internal specialist departments, external partners and manufacturers
Our Requirements
- Completed basic training as an IT specialist EFZ or a comparable qualification
- At least seven years of professional experience in the enterprise IT environment, several years of which in a technically responsible system engineering role
- Solid practical experience with several of the following technologies: Windows Server, Microsoft 365, Active Directory, Microsoft Entra, VMware, ADFS, DNS
- Very good understanding of Identity & Access Management and Microsoft-based infrastructure architectures
- Experience with PowerShell as well as GitLab or comparable automation and DevOps tools
- Knowledge of update and patch management solutions such as Ivanti or comparable products
- Experience with monitoring solutions such as PRTG
- Familiarity with ITIL processes and working with ITSM tools
- Strong security mindset and understanding of operating business-critical systems
- Ability to analyse complex technical contexts and to represent architecture and technology decisions in a well-founded manner
- Independent, structured and responsible way of working
- Very good German skills as well as good English skills
Your Prospects
- A genuine senior engineering role with technical responsibility and scope for design
- Demanding enterprise infrastructure with high requirements for security, stability and availability
- Significant influence on the modernisation and future orientation of the Microsoft system landscape
- Varied tasks between system engineering, IAM, security, automation, architecture and project work
- Independent responsibility for complex changes and migrations
- Opportunity to actively help shape technical standards and future architectural decisions
- Collaboration with experienced IT specialists and various departments
- Long-term prospects at an established Swiss company in a future-relevant environment
- Choice of workplaces between Weinfelden TG and Landquart GR
- You bring solid enterprise experience and want to achieve more technically than tickets and standard administration? Prime21 will personally and straightforwardly accompany you through the application process at esolva.
