M365 Exchange Engineer

Role Overview As a Technical Expert - M365 Exchange within the Communication & Collaboration IT Service Center, you will lead the technical configuration, maintenance, and migration from a legacy custom-built messaging system to Exchange Online. This role balances hands-on engineering, automation, tier-2/3 incident resolution, and project delivery to ensure secure, resilient enterprise communication for Colruyt Group.

Key Responsibilities

• Build & Cloud Migration: Lead technical execution for Exchange Online and Hybrid Exchange (Exchange Server SE). Automate provisioning, lifecycle workflows, and M365 integrations using PowerShell and Microsoft Graph API.
• Operations & Lifecycle Management: Design and execute operational support models. Perform release testing, proactive monitoring, patch management, and KPI reporting to drive continuous platform optimization.
• Incident & Tier 2/3 Support: Act as high-level technical escalation for messaging issues. Conduct root-cause analysis, mail security investigations, and structural remediations within established SLAs/SLEs.
• Change & Knowledge Management: Author operational documentation, build internal knowledge bases, and execute system changes with concrete rollback strategies. Elevate team expertise through structured knowledge sharing.
• Stakeholder Alignment: Partner with IT architects, system engineers, security teams, and business product owners to align messaging capabilities with enterprise architecture goals.

Technical Requirements

• Experience: 7+ years in Enterprise System Engineering, specializing in M365 and Exchange architecture.
• Messaging Core: Deep expertise in Exchange Online, Exchange Server SE, hybrid coexistence, and enterprise migration strategies.
• Mail Flow & Security: Mastery of SMTP routing, connectors, transport rules, message traces, and authentication protocols (SPF, DKIM, DMARC).
• Automation: Advanced PowerShell scripting for administration, reporting, and Microsoft Graph API integration.
• Adjacent Tech: Working knowledge of Azure Communication Services (ACS) and broad M365 ecosystem integrations.

Core Competencies

• Analytical Problem Solver: Able to break down complex architectural issues into sustainable, long-term technical fixes.
• Platform Ownership: Drives end-to-end accountability for platform stability, security, and continuous modernization.
• Communication & Collaboration: Strong cross-functional alignment skills with both technical teams and business stakeholders in fluent English