L3 Support Consultant

Keystone Solutions is seeking a Level 3 IT Support Consultant to contribute to the management, maintenance, and improvement of our client's IT infrastructure. This consultancy mission will take place on-site at the client location, where you will represent Keystone Solutions while tackling complex incidents related to Windows environments, Microsoft 365, Entra ID, Intune, endpoint security, and essential infrastructure services (DNS, DHCP, Exchange Online, Teams, etc.).

• →Provide Level 3 technical support for server environments, Microsoft 365, Intune, security, and network infrastructure.
• →Diagnose and resolve complex incidents (Windows Server, Active Directory, Entra ID, DNS/DHCP, M365, Intune, Teams, Exchange Online, etc.).
• →Analyze root causes (RCA) and propose sustainable corrective actions.
• →Monitor the infrastructure using monitoring tools (SolarWinds, Defender, M365 portals).
• →Manage accounts, rights, and policies in Active Directory and Entra ID (MFA, CA, groups, licenses).
• →Administer Microsoft 365 platforms: Exchange Online, Teams/Teams Rooms, SharePoint/OneDrive.
• →Manage and troubleshoot devices via Intune (compliance, configuration profiles, Autopilot).
• →Process and track alerts from Defender for Endpoint & O365 solutions.
• →Maintain technical documentation, operational procedures, and best practices.
• →Apply current security and compliance policies (ISO27001, NIS2, GDPR).
• →Collaborate with systems and network teams for cross-functional incidents.
• →Participate in technical evolutions and migrations under the supervision of the infrastructure team.

• Administration Windows Server - Level: Intermediate - Most recent: This year
• Azure – EntraID – Conditional Access - Level: Intermediate - Most recent: This year
• Connaissance réseaux - Level: Intermediate - Most recent: This year
• Defender for Endpoint & 365 - Level: Intermediate - Most recent: This year
• DNS & DHCP - Level: Intermediate - Most recent: This year
• Documentation technique - Level: Beginner - Most recent: This year
• Exchange Online – mailflow, traces, antispam - Level: Intermediate - Most recent: This year
• Gestion Active Directory - Level: Intermediate - Most recent: This year
• Intune administration – Compliance – Configuration Profiles - Level: Intermediate - Most recent: This year
• ITIL - Level: Nice to have - Most recent: This year
• M365 administration - Level: Intermediate - Most recent: This year
• Monitoring et gestion des incidents - Level: Intermediate - Most recent: This year
• Monitoring via Solarwinds - Level: Intermediate - Most recent: This year
• Sauvegarde et restauration - Level: Nice to have - Most recent: This year
• SCCM - Level: Beginner - Most recent: This year
• Scripting Powershell - Level: Intermediate - Most recent: This year
• Ségregation et sécurité - Level: Beginner - Most recent: This year
• Teams Administration - TeamsRoom - Level: Intermediate - Most recent: This year
• Virtualisation (VMware, Hyper-V) - Level: Nice to have - Most recent: This year

Dutch
Level Full professional proficiency
English
Level Full professional proficiency
French
Level Full professional proficiency