Technicien(ne) informatique senior – Support HelpDesk
Core
Senior Level 3 IT technician resolving complex incidents, managing escalations, and administering Microsoft 365, Active Directory, and network infrastructure for SME clients.
Role type
Senior Level 3 IT Support Technician
Builds
IT support services and infrastructure stability for SME clients
Domain
IT Services / Managed Services
Deliverable
client delivery
Required skills
Incident resolution, Active Directory, Microsoft 365, Network diagnostics (DNS, DHCP, TCP/IP, VPN, VLAN), PowerShell automation, Remote support tools, Ticketing systems, VMware, Backup solutions
Preferred skills
MSP experience, ConnectWise, Fortinet, Cybersecurity, Microsoft Graph, REST APIs, Power Platform, Microsoft/Network/Security certifications
Technologies
Active Directory, Azure, Microsoft 365, PowerShell, REST, SharePoint, TCP/IP, VPN, VMware, Windows, Office 365, Cloud Support
Responsibilities
Resolve complex incidents escalated from Level 1 and 2 teams; Diagnose issues related to Microsoft 365, Windows Server, Active Directory, workstations, networks, and access; Review logs, determine root causes, and apply sustainable fixes; Prioritize based on urgency and impact, track tickets, and keep clients informed; Administer Microsoft 365, Exchange Online, SharePoint Online, Entra ID, Active Directory, GPO, and RDS; Troubleshoot DNS, DHCP, TCP/IP, VPN, VLAN, routing, and firewall issues; Intervene in virtualized environments and backup/restore solutions; Apply security practices for access management, MFA, updates, and endpoint/data protection; Document diagnostics and procedures in the knowledge base; Mentor Level 1 and 2 technicians; Travel to client sites for complex incidents and preventive maintenance.
Seniority
Senior, hands-on IC