L3 Support Consultant

Mission Overview

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.).

Key Responsibilities

• 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.

Why Join Keystone Solutions?

As a consultant at Keystone Solutions, you will experience

• Consultancy Nature: Engage in on-site work and embrace your consultant identity.
• Dynamic Projects: Tackle a variety of challenges across different client environments.
• Turbo-Charged Learning: Benefit from professional development and broad learning experiences.
• Skyrocketing Ambition: Enjoy a commitment to career growth within our framework.
• Values: Being a "K-Stone" means bringing our core values to every engagement.

If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal .

Duration: 24/08/2026 - 23/08/2028 24 months • (full time)

Skills required

• 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

Language requirements

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