Senior System Engineer

Your Role

As a Senior System Engineer, you will report to the team leader of the System Team in the Platform department. You will play a key technical role in the implementation, evolution, and operational stability of Microsoft-based infrastructure platforms, both internally and for our clients.

You will act as a technical reference within the team, contributing to system design decisions, operational best practices, and continuous improvement of our services. In this role, you combine strong hands‑on expertise with the ability to anticipate issues, standardize solutions, and collaborate effectively with engineers, architects, and customers.

• Implement, maintain, and evolve Microsoft-based environments (Windows Server, Active Directory, WSUS, SQL Server, IIS, etc.)
• Administer and optimise virtualised environments (VMware ESXi, vCenter; VM lifecycle management)
• Design and optimise system architectures to ensure performance, scalability, and security
• Monitor infrastructure health and proactively identify and resolve potential issues
• Provide 2nd‑level and advanced support, handling complex incidents and root‑cause analysis
• Automate operations using tools like Power Shell, Puppet, Rundeck, and Terraform
• Manage the lifecycle of Microsoft systems, ensuring they remain stable, secure and up to date
• Share knowledge and contribute to technical standards, documentation, and team best practices

• A pleasant working environment in a motivated team with solid expertise.
• A broad field of technology, from standard applications to micro‑services on public clouds.
• An amazing work diversity ranging from small projects to wide programs.
• Intensive collaboration with ELCA engineers, experts, and managers as well as directly with customers from various business areas.

You are passionate about technology; you learn constantly, and you love to master challenges in a changing environment.

You see yourself as a senior engineer that can lead critical implementation and production system activities, that can efficiently solve issues and communicate your knowledge among engineers. You can detect and propose proactive actions to avoid that can arise from many aspects of the service. You like teamwork and constant interaction with customers, internal or external.

• Windows Server and Microsoft ecosystem (AD, GPO, IIS, SQL Server, WSUS, RDS, DFS)
• Virtualisation (VMware vSphere, proxmox)
• Backup solutions (Veeam)
• Networking fundamentals (DNS, DHCP, VPNs, firewalls, proxy, load balancers)
• Scripting and automation (Power Shell, python)
• Monitoring tools (CheckMK or similar)
• Infrastructure as Code / configuration management (Terraform, Puppet)

• Exposure to public cloud platforms (AWS, Azure)
• Experience with Linux administration (Debian, RHEL)
• Strong troubleshooting and analytical skills
• Ability to document and share knowledge
• Customer‑oriented mindset with good communication skills

The position is based in Lausanne or Geneva. Excellent written and spoken French and English are required; proficiency in German is an asset.