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Senior M365 Messaging & Security Engineer Job ID JP054249
Job Location:
Monthly Salary:
Posted:
28 May 2026 (30+ days ago)
Posted:
Application Deadline:
25 August 2026
Application Deadline:
Vacancies:
1 Vacancy
Vacancies:
Job Summary
Senior M365 Messaging & Security Engineer
We are looking for a Senior IT System Engineer with extensive experience in Microsoft messaging environments secure integrations and M365 security architectures within complex multi-forest and multi-tenant environments.
Key Responsibilities
- Design implement and support secure M365 and messaging infrastructures
- Manage and secure SMTP flows through Exchange Online and Fortimail
- Configure and maintain anti-spam quarantine blacklisting and mail protection mechanisms
- Implement secure integrations between M365 and third-party systems
- Manage identity protection and synchronization across multi-forest environments
- Develop and automate processes using PowerShell Microsoft Graph and scripting tools
- Support advanced Microsoft Purview features including:
- Data Lifecycle Management
- Auditing
- eDiscovery
- Information Barriers
- Troubleshoot complex Outlook Exchange Online and hybrid cloud/on-premise environments
- Monitor security alerts and support investigations with security teams
- Create technical documentation standards procedures and architecture designs
- Contribute to roadmap planning technology watch and infrastructure improvements
Required Skills & Experience
- 15 years of experience in messaging and collaboration technologies
- Strong expertise in:
- Exchange Online
- Microsoft 365 & Outlook
- Entra ID / Entra Connect
- Fortimail
- SMTP and mTLS
- Microsoft Graph
- PowerShell scripting and automation
- Microsoft Defender for Cloud
- Microsoft Purview
- Deep understanding of hybrid cloud/on-premise integrations and certificate management
- Experience in complex multi-tenant multi-domain and multi-forest environments
- Strong knowledge of GDPR and security best practices
Certifications (Preferred)
- MS-203: Microsoft 365 Messaging
- AZ-900: Azure Fundamentals
- ITIL Foundation
Profile
- Strong analytical and troubleshooting skills
- Able to work autonomously and within multidisciplinary teams
- Experience managing complex technical requests and infrastructure projects
- Excellent documentation and communication skills
Languages
- French and Dutch: professional proficiency
- English: full professional proficiency
Work Setup
- Hybrid working model with minimum 2 days onsite per week
- Location: Brussels
