Senior Microsoft 365 Administrator

Lallemand; Paris; Hybride; EUR 65 000 - 85 000; Plein temps

Résumé du poste

A global biotechnology company is seeking an experienced Senior Microsoft 365 Administrator to lead the design, administration, and integration of their Microsoft 365 environment. This includes managing Exchange, SharePoint, and Teams while ensuring security and efficiency. The ideal candidate will have 7-10 years of experience, possess a Bachelor’s degree, and be authorized to work in France. The role offers a hybrid work model.

Qualifications

• 7-10 years of hands-on experience administering Microsoft 365 or similar platforms.
• Must have legal authorization to work in France.
• Experience with Microsoft 365 Copilot and AI services.

Responsabilités

• Oversee daily administration of Microsoft 365 services.
• Manage user and service accounts in Entra ID.
• Implement MFA and phishing-resistant authentication.
• Lead M&A tenant-to-tenant migrations.
• Administer Teams tenant-wide including guest access.
• Monitor service health and provide Tier-3 support.

Connaissances

Microsoft 365 Administration

Entra ID (Azure AD)

Security & Compliance

PowerShell & Automation

Migration Tools

Intune & Endpoint Manager

Networking & Security Integration

Troubleshooting Utilities

AI & Emerging Tools

Formation

Bachelor's degree in computer science or related field

Description du poste

Main Functions

We are seeking an experienced Senior Microsoft 365 Administrator to lead the design, administration, and integration of our Microsoft 365 environment and collaboration platforms. This high-level technical role ensures the stability, security, and efficiency of Microsoft 365 services—including Exchange Online, SharePoint Online, OneDrive, Teams, and the underlying Entra ID (Azure AD) identity platform—while driving enterprise-scale projects such as mergers and acquisitions, tenant-to-tenant migrations, and modern workplace innovations. You will work closely with IT teams (security, infrastructure, identity, endpoint) and business stakeholders to enable secure, productive, and scalable digital workspaces.

Responsibilities

• Tenant Administration & Governance – Oversee daily administration of Microsoft 365 services (Exchange, SharePoint, OneDrive, Teams, Intune, Office apps). Monitor the Microsoft 365 Message Center, coordinate rollout of new features, and enforce governance policies. Implement SharePoint governance strategies, retention labels, Teams policies, and collaboration best practices.
• User & License Management – Administer user and service accounts in Entra ID. Manage licenses, roles, and group memberships. Ensure efficient onboarding and offboarding through automated processes and reclaim unused licenses while preserving data.
• Identity Security & Access Management – Implement MFA, phishing-resistant authentication, Conditional Access, Entra-first strategy, and federation (e.g., managed Apple IDs, WhatsApp). Automate joiner-mover-leaver (JML) workflows, role-based provisioning, and periodic access reviews.
• Exchange Online Administration – Manage mailboxes, distribution groups, retention policies, and security settings (anti-spam, anti-phishing). Troubleshoot complex mail flow issues and coordinate with Microsoft support.
• SharePoint Online & OneDrive Management – Govern sites and storage usage, external sharing policies, permissions, and retention. Lead content migrations from file servers and other platforms, ensuring integrity and compliance.
• Microsoft Teams Administration – Administer Teams tenant-wide (policies, channels, meetings, guest access, external domains) including Teams Phone System. Ensure adoption, governance, and troubleshooting at scale.
• Intune & Device Compliance – Manage integration with Endpoint Manager for device compliance, conditional access, application deployment, and secure access to Microsoft 365 services. Align device and collaboration policies across mobile, Windows, and macOS endpoints.
• Integration & Migration Projects – Lead M&A tenant-to-tenant migrations (mailboxes, Teams, SharePoint, OneDrive) and global rollouts of M365 services. Plan, coordinate, and execute projects ensuring data integrity and minimal disruption.
• Security & Compliance Management – Configure and maintain DLP, retention labels, sensitivity labels, and auditing in Microsoft Purview. Implement periodic permission audits, data loss prevention, and compliance with corporate / industry regulations.
• Automation & Optimization – Develop PowerShell and Microsoft Graph API scripts for automation, reporting, onboarding, license assignments, and compliance. Continuously streamline processes to increase efficiency.
• Monitoring, Incident & Problem Management – Monitor service health and analytics across Exchange, Teams, SharePoint, OneDrive, and Entra ID. Provide Tier-3 support, manage incident escalation, root cause analysis (RCA), and problem resolution in line with ITIL standards.
• Digital Employee Experience & Adoption – Define user personas, collect user sentiment, track adoption metrics, and improve workflows.
• AI Governance & Innovation – Lead adoption and governance of Microsoft 365 Copilot and AI features. Ensure alignment with compliance, data residency, and ethical frameworks. Monitor usage, establish guardrails, and drive value through AI innovation.
• Roadmap & Strategic Alignment – Deliver initiatives aligned with the Modern Work & Collaboration roadmap: SharePoint governance, retention, Teams Voice, Outlook migration, Adobe Cloud integration, CDN deployment, Copilot adoption, data organization, Fabric initiatives, and security score improvements.

Technical skills

Required

• Microsoft 365 Administration – Expert administration of Exchange (on-prem and online), SharePoint, OneDrive, Teams, Intune, and Office apps with strong governance and security practices.
• Entra ID (Azure AD) – Advanced expertise in user / group management, Conditional Access, MFA, federation, application SSO, and hybrid identity synchronization (AD Connect).
• Security & Compliance – Strong knowledge of Microsoft Purview, DLP, retention, sensitivity labels, eDiscovery, Microsoft Defender for Office 365, and compliance centers.
• PowerShell & Automation – Advanced scripting to automate admin tasks, reporting, and compliance. Experience with Microsoft Graph API for advanced automation.
• Migration Tools – Skilled in Exchange Online migration (cutover / staged / hybrid), SharePoint Migration Tool, Quest, ShareGate, and other tenant-to-tenant migration methods.
• Intune & Endpoint Manager – Hands-on management of device compliance, policy enforcement, application deployment, and integration with Conditional Access.
• Hybrid Environments – Strong understanding of coexistence between on-prem AD / Exchange and Microsoft 365.
• Networking & Security Integration – Familiarity with DNS, certificates, VPN, Zero Trust principles, and firewall integrations impacting M365 services.
• Troubleshooting Utilities – Skilled with diagnostic tools (Message Trace, M365 network connectivity analyzers, Support and Recovery Assistant, etc.) for deep problem resolution.
• AI & Emerging Tools – Experience with Microsoft 365 Copilot, AI adoption metrics, and responsible configuration of emerging Microsoft AI services.
• Education : Bachelor’s degree in computer science, Information Technology, or a related field; or equivalent professional experience.
• Experience : 7-10 years of hands-on experience administering Microsoft 365 (Office 365) or similar cloud collaboration platforms in a business environment. Prior experience in IT infrastructure or systems administration is advantageous to provide a strong foundation.
• Certifications (preferred) :
• MS-102 / MS-100 / MS-101 (Microsoft 365 Administrator)
• SC-300 (Identity & Access Administrator)
• SC-400 (Information Protection & Compliance)
• Teams Administrator (MS-720)
• Methodologies : Familiarity with ITIL practices for incident, problem, and change management.

Personal abilities

• Must be fluent in English (speaking French, Portuguese, Spanish is an asset)
• Strong Communication & Collaboration : Excellent verbal and written communication skills. Capable of explaining technical concepts to non-technical stakeholders in clear language. Works well with cross-functional teams and enjoys helping end-users get the best from IT solutions.
• Problem-Solving Mindset : Analytical and calm under pressure. Able to methodically troubleshoot complex issues and drive them to resolution. A resourceful self-starter who can research solutions (via documentation or community forums) when faced with new challenges.
• Organization & Time Management : Well-organized, able to juggle multiple tasks and projects. Prioritizes effectively between urgent operational issues and longer-term project work. Can manage periodic high-pressure situations (like major incident outages or tight project deadlines) while maintaining professionalism.
• Initiative & Continuous Improvement : Proactive in identifying areas for improvement in the environment (e.g., opportunities to automate, or need for a new policy) and driving those enhancements. Shows initiative in learning new features or technologies – demonstrating an autonomous, continuous learning attitude to keep skills current.
• Customer Service Orientation : Friendly and patient when dealing with users’ problems. Committed to delivering a high-quality IT service experience. Understands that uptime, responsiveness, and clear communication greatly impact user productivity and strives to excel in these.
• Team Player : Great team spirit with a proven ability to collaborate and share knowledge. Willing to mentor junior technicians or share insights with peers. Values collective success and contributes to an inclusive, supportive team environment.
• Adaptability : Embraces change and new ideas. The Microsoft cloud evolves quickly; this role requires someone who is adaptable and open to adopting new tools or approaches as the platform grows.
• Reliability and Ownership : Takes ownership of tasks and follows through to completion. Reliable in executing routine maintenance (e.g., quarterly access reviews, backups) and in being available for occasional off-hours work or on-call rotations if required (e.g., to handle critical updates or outages). Demonstrates integrity and trustworthiness in handling administrative access to systems.

General criteria

• Travel : Willingness to travel internationally to our offices as needed. Occasional travel may be required for project rollouts, on-site training, or IT integration efforts at global sites. (Valid passport and any necessary travel documents / vaccinations are required.)
• Work Hours : This role is based in France (with a hybrid work arrangement). Standard business hours with flexibility for off-hour maintenance or emergency response. You may need to be on-call for critical issues on a rotational basis.
• Legal Authorization : Must have legal authorization to work in France. (If you are based in another country, authorization in that location is required, and you’ll coordinate with our global IT remotely.)

Organization

Lallemand is a privately held Canadian company founded in the late 19th century, which develops, produces, and markets microorganisms for various markets. The administrative offices of the parent company are in Montreal, Canada. Today, Lallemand employs more than 5,000 people working in more than 45 countries on 5 continents.

Lallemand's corporate division encompasses all of the support services offered to our branches. Its goal is to optimize internal processes, ensure that your operation is running smoothly, and that your strategy is well thought-out.

Our corporate branch's head office is located in Montreal, Canada, and relies on a team that specializes in : Management; Finance and accounting; Engineering; Research and Development (R&D); Human Resources (HR); and Information Technology (IT). If you want to help bring enthusiasm, collaboration and innovation to our workplace, we'd love to get to know you!

Please take note that accommodations will be provided in all parts of the hiring process. Applicants need to make their needs known in advance.