Digital Collaboration Workplace Expert

The Senior Microsoft365 Engineer – Platform, Governance & Operations plays a critical role in designing, securing, and operating Ipsen’s Microsoft 365 platform at scale.
The purpose of this position is to own the end‑to‑end technical integrity of the Microsoft 365 ecosystem , ensuring that collaboration & productivity services (Exchange Online, SharePoint Online, Teams, OneDrive, Power Platform, Copilot) are reliable, secure, compliant, and aligned with enterprise governance standards.
This role bridges the gap between identity, security, digital workplace, and infrastructure teams by providing a transversal, hands‑on engineering capability across all core Microsoft 365 workloads.
The engineer acts as the technical reference (L3) for Microsoft 365 , taking ownership of complex incidents, architectural decisions, and operational excellence, while reducing dependency on external partners and improving service quality.
In addition, this position is key to enabling Microsoft 365 Copilot safely and efficiently , by preparing the tenant from a technical and data‑governance standpoint, ensuring that Copilot usage is compliant, secure, and value‑driven.
Ultimately, the role ensures that Microsoft 365 is not only a collaboration platform, but a robust, governed, and industrialized enterprise service supporting Ipsen’s business, regulatory, and security requirements.
WHAT

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- Main Responsibilities & Technical CompetenciesundefinedMicrosoft 365 Architecture & Platform EngineeringDesign, maintain, and evolve the Microsoft 365 technical architecture across core workloads (Exchange Online, SharePoint Online, Teams, OneDrive, Power Platform, Copilot).
Ensure architectural consistency between collaboration services, identity, security, and compliance layers.
Act as a technical authority for platform design decisions and roadmap evolution.
Advanced Operations & L3 SupportServe as the Level 3 technical reference for Microsoft 365.
Exchange Online : Mail flow / connectors / EOP / Defender for O365 / Transport rules, journaling, archivingundefinedTeams : Policies (meeting, messaging, app policies), Lifecycle / M365 Groups / App governance (store, custom apps, Copilot apps)SharePoint : Site provisioning / permissions models / storage architecture / permission managementundefinedPowerPlatform : Environment strategy (default vs dedicated) / Dataverse (governance, capacity) / Connectors governance (standard vs premium vs custom) / ALM / pipelines / PermissionsPurview : Sensitivity labels / Auto‑labeling / DLP / Records management / Insider risk / communication complianceObservability : Service health monitoring (Message Center exploitation) / Unified audit logs / Custom monitoring / alerting / Technical KPISecurity : Defender suite / Secure Score / App consent governance / External sharing security modelAutomation : Tenant-wide automation / CI/CD / source control / Graph API / PowershellHandle complex incidents, root cause analysis, and recurring issues affecting M365 services.
Lead technical escalations with Microsoft Support and strategic partners.
Define and maintain operational runbooks, monitoring standards, and service KPIs.
Governance, Security & Compliance ImplementationTranslate governance, security, and compliance requirements into concrete Microsoft 365 configurations.
Ensure Microsoft 365 services comply with internal standards and regulatory constraints.
Technically deploy Purview, eDiscovery, and audit requirements.
Define and manage proper and efficient licensing managementDefine and enforce governance for SharePoint Online and Power Platform (environments, permissions, data exposure).
Implement and enforce policies related to:Data lifecycle and retentionInformation protection and DLPAccess control and service boundariesAI Enablement (Platform Perspective)Prepare and secure the Microsoft 365 tenant for Copilot usage.
Ensure data exposure, permissions, and search behaviors are properly controlled.
Work closely with security and digital workplace teams to enable Copilot in a compliant and controlled manner.
Automation & IndustrializationAutomate Microsoft 365 administration using PowerShell and Microsoft Graph.
Reduce manual operations and operational risks through scripting and standardization.
Contribute to continuous improvement of platform reliability and efficiency.
Cross‑Team CollaborationAct as a transversal link between Identity, Security, Infrastructure, and Digital Workplace teams.
Provide technical guidance and best practices to internal teams.
Support decision‑making by providing clear technical recommendations and risk assessments.
Knowledge & Experience (essential):Minimum 5 years of experienceExcellent, all-round communicator.
Self-motivated and capable of managing multiple priorities and tasks as delegated.
Team player with the ability to work in a collaborative