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.

What we are looking for

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

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