Senior System Engineer

Lenz & Staehelin, one of Switzerlands most renowned business law firms, has exclusively mandated us to search for a highly experienced Senior System Engineer to further strengthen its IT department at the Geneva location.

In this role, you will support and continuously develop a complex, predominantly on-premise IT infrastructure and take on a key expert position within a professional and well-structured IT organisation. The position is available immediately or by mutual agreement.

• Operate, administer, and continuously improve an enterprise-level Windows Server and Linux server environment, with a strong focus on Microsoft technologies.
• Take a leading role in IT operations while contributing to system engineering, optimisation, and long-term infrastructure development in close collaboration with internal teams.
• Administer and further develop a hyperconverged infrastructure (HCI) based on VMware; experience with KVM is an advantage.
• Install, operate, and maintain Citrix server environments (Citrix Virtual Apps and Desktops).
• Operate Microsoft SQL Server databases used as application backends, acting as a technical SQL Server DBA.
• Manage, maintain, and further develop the network infrastructure, including LAN, WAN, routing, switching, and firewall components.
• Design, implement, and maintain automation and orchestration solutions using Power Shell and Ansible.
• Perform advanced system administration via command line and console, not limited to graphical user interfaces.
• Monitor and manage storage, backup, and data protection solutions.
• Lead and participate in infrastructure projects, working closely with colleagues, internal stakeholders, and external partners.
• Provide advanced technical support and escalation for complex incidents, coordinating with vendors and service providers where appropriate.
• Create and maintain technical documentation, operational procedures, and shared standards.
• Maintain a holistic view of the overall IT infrastructure and actively contribute to a stable, well-coordinated IT organisation.

• University degree in Computer Science, Information Technology, or a comparable qualification, or equivalent professional experience.
• Extensive professional experience in a Senior System Engineer, Infrastructure Engineer, or Senior Systems Administrator role within complex enterprise environments.
• Deep expertise in Microsoft on-premise environments (Windows Server, Active Directory, Exchange).
• Experience with Microsoft Entra , Azure, and Intune in a hybrid context.
• Experience with Linux system administration in enterprise environments.
• Excellent knowledge of VMware, hyperconverged infrastructure, and virtualisation technologies; KVM knowledge is a plus.
• Very good knowledge of Citrix, Microsoft SQL Server, storage, and backup solutions.
• Strong Power Shell scripting skills are required, and experience with Ansible automation is considered an advantage.
• Proven networking skills (TCP/IP, DNS, DHCP, routing, switching).
• Strong analytical abilities combined with a collaborative, team-oriented mindset.
• Ability to work independently while being a reliable and supportive team member.
• Very strong troubleshooting skills and experience in handling complex incidents.
• Very good French language skills are mandatory.
• English proficiency at a minimum B2 level.
• Due to regulatory and operational requirements, permanent residence in Switzerland and unrestricted work authorisation are required.

• A senior-level position with a high degree of responsibility in a professional on-premise IT environment.
• A technically challenging role with close collaboration within an experienced IT team.
• A long-term perspective in a stable, structured, and cooperative working environment.

I as Managing Partner at The Brains am your point of contact. If this exciting challenge appeals to you, I look forward to receiving your complete application documents by e-mail at o.hoffmann .

If you have any questions, I will be happy to assist you at .