Senior System Engineer

ELCASecurity; Schweiz; Hybrid; CHF 120,000 - 180,000; Full time

Benefits offered by this job

Pleasant environment

Broad technology field

Work diversity

Collaboration with ELCA engineers

Job summary

ELCA is seeking a Senior System Engineer to join the Platform Department's System Team in Lausanne or Geneva. You will drive the implementation, evolution and operational stability of Microsoft‑based infrastructure for internal and client projects.

You will combine hands-on expertise with proactive problem solving, design decisions, and automation using PowerShell and IaC. Collaborate with engineers, architects and customers to ensure performance, security and reliability.

Qualifications

• Experience with Windows Server and Active Directory in enterprise environments.
• Strong scripting (PowerShell, Python) and automation mindset.
• Knowledge of virtualization, backups, networking fundamentals, and monitoring.
• Familiarity with IaC tooling like Terraform and configuration management (Puppet).
• Ability to collaborate with engineers, architects and customers.

Responsibilities

• Implement, maintain and evolve Microsoft-based environments.
• Administer and optimize virtualized environments (VMware, Proxmox).
• Design scalable, secure system architectures.
• Monitor health, troubleshoot and resolve incidents.
• Automate operations and standardize procedures.
• Document standards and share knowledge across the team.

Skills

Windows Server

Active Directory

PowerShell

Python

Networking basics

Monitoring tools

Automation

Infrastructure as Code

Tools

VMware vSphere

Proxmox

CheckMK

Terraform

Puppet

Veeam

Job description

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.

In the team you will oversee:

• Implement, maintain, and evolve Microsoft-based environments (Windows Server, Active Directory, WSUS, SQL Server, IIS, etc.)
• Administer and optimize virtualized environments (VMware ESXi, vCenter; VM lifecycle management)
• Design and optimize 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 PowerShell, 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

Our offer

• 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.

Your profile

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.

Your expertise covers some or all the following:

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

Additional strengths

• 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.