Senior System Engineer - Level 2-3 Support - Microsoft 365

For one of our major clients in Geneva, we are looking for a Senior Microsoft Workplace & VDI Engineer to reinforce a skilled Level 2 support team (4 people).
This is a 100% on-site, hands-on role with real ownership. You will act as the technical reference for Microsoft environments, VDI platforms, endpoint security, monitoring, and automation, ensuring a high-performance, secure, and seamless end-user experience.
If you enjoy solving complex issues, optimizing systems at scale, and working close to the business, this role is for you.
Modern Workplace & Infrastructure Support
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Handle Level 2 & Level 3 incidents and requests, with a focus on complex and high-impact issues.
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Support and mentor Level 1 teams, especially on Microsoft services (Outlook, Exchange, Teams).
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Administer and evolve the Omnissa (formerly VMware EUC) ecosystem: Horizon, Workspace ONE, UEM (VDI/DaaS & endpoints).
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Manage and optimize the Microsoft stack: Windows 10/11, Intune/SCCM, Entra ID, Teams.
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Ensure stability, security, and compliance across workstations and mobile devices.
Monitoring, Performance & User Experience
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Administer on-premise monitoring tools for infrastructure health and capacity.
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Deploy and operate user experience monitoring solutions (ControlUp or equivalent).
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Diagnose performance bottlenecks and optimize infrastructure paths.
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Implement automated performance benchmarks and integrate them into monitoring systems.
Identity, Security & Deployments
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Configure and manage Entra ID (Azure AD), access policies, and identity services.
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Administer Microsoft Teams for secure, reliable collaboration.
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Design and execute OS, application, and patch deployment strategies.
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Apply endpoint security and compliance best practices.
Automation & Engineering Practices
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Develop and maintain PowerShell automation scripts.
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Contribute to CI/CD pipelines using GitHub for infrastructure and workplace automation.
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Exposure to Terraform or Infrastructure as Code is a strong plus.
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Apply testing and validation processes to guarantee deployment quality.
Service Management & Knowledge Sharing
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Work with ServiceDesk+ (ITSM) for incident, change, and problem management.
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Participate in MDM / cmdm administration for endpoint and mobile security.
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Produce clear, structured documentation: runbooks, procedures, and technical guides.
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Actively contribute to knowledge sharing across L1/L2/L3 teams.
What we are looking for
Technical Expertise
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Strong background in Microsoft workplace technologies:
Windows, Intune/SCCM, Teams, Entra ID, Exchange, Outlook
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Proven hands-on experience with Omnissa / VMware EUC (Horizon, Workspace ONE, UEM).
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Solid expertise in monitoring, troubleshooting, and performance optimization.
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Advanced PowerShell scripting skills.
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Good understanding of CI/CD tools and GitHub; Terraform is a plus.
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Experience with ITSM tools (ServiceDesk+) and MDM solutions.
Experience
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15+ years of professional experience.
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Strong track record in L2/L3 support within on-premise or hybrid environments.
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Comfortable acting as a technical authority and escalation point.
Languages
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English: Fluent
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French: Strong asset
Avenue Louis Casai 18 1209 Geneve