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.

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

Modern Workplace & Infrastructure Support

• Handle Level 2 & Level 3 incidents and requests , with a focus on complex and high-impact issues.

• Support and mentor Level 1 teams , especially on Microsoft services (Outlook, Exchange, Teams).

• Administer and evolve the Omnissa (formerly VMware EUC)  ecosystem: Horizon, Workspace ONE, UEM (VDI/DaaS & endpoints).

• Manage and optimize the Microsoft stack : Windows 10/11, Intune/SCCM, Entra ID, Teams.

• Ensure stability, security, and compliance  across workstations and mobile devices.

Monitoring, Performance & User Experience

• Administer on-premise monitoring tools  for infrastructure health and capacity.

• Deploy and operate user experience monitoring solutions  (ControlUp or equivalent).

• Diagnose performance bottlenecks and optimize infrastructure paths .

• Implement automated performance benchmarks  and integrate them into monitoring systems.

Identity, Security & Deployments

• Configure and manage Entra ID (Azure AD) , access policies, and identity services.

• Administer Microsoft Teams  for secure, reliable collaboration.

• Design and execute OS, application, and patch deployment strategies .

• Apply endpoint security and compliance best practices .

Automation & Engineering Practices

• Develop and maintain PowerShell automation scripts .

• Contribute to CI/CD pipelines  using GitHub for infrastructure and workplace automation.

• Exposure to Terraform or Infrastructure as Code  is a strong plus.

• Apply testing and validation processes to guarantee deployment quality.

Service Management & Knowledge Sharing

• Work with ServiceDesk+ (ITSM)  for incident, change, and problem management.

• Participate in MDM / cmdm administration  for endpoint and mobile security.

• Produce clear, structured documentation: runbooks, procedures, and technical guides .

• Actively contribute to knowledge sharing  across L1/L2/L3 teams.

Technical Expertise

• Strong background in Microsoft workplace technologies :

  Windows, Intune/SCCM, Teams, Entra ID, Exchange, Outlook .

• Proven hands-on experience with Omnissa / VMware EUC  (Horizon, Workspace ONE, UEM).

• Solid expertise in monitoring, troubleshooting, and performance optimization .

• Advanced PowerShell scripting  skills.

• Good understanding of CI/CD tools and GitHub ; Terraform  is a plus.

• Experience with ITSM tools  (ServiceDesk+) and MDM solutions .

Experience

• 15+ years of professional experience .

• Strong track record in L2/L3 support  within on-premise or hybrid environments .

• Comfortable acting as a technical authority and escalation point .

Languages

• English: Fluent

• French: Strong asset