Freelancer profile translated to English.
Back to original languageAbout Yoann
Expert Microsoft 365 with over 8 years of experience in critical environments, I assist companies in optimizing and securing their Cloud infrastructure. My background in large organizations, including managing a tenant of over 50,000 users, has allowed me to develop rare expertise in large-scale administration and PowerShell automation.
My approach is based on three pillars: security, compliance, and resilience. I don't just configure tools; I secure your email flows via DMARC, SPF, and DKIM protocols and ensure the management of your mobile fleets via Microsoft Intune. My mastery of hybrid infrastructures (Windows/Linux, VMware) and networks (Fortinet, Cisco Meraki) allows me to guarantee high availability of your services, even in the most complex environments.
French
Native or bilingual
English
Fluent
Japanese
Basic
Remote only
Primarily works remotely
Experience
- Groupe EDHMicrosoft 365 Cloud EngineerEDUCATION AND E-LEARNINGMarch 2024 - March 2026 (2 years)Paris, France
- Email Security Audit and Hardening: Complete compliance of DMARC, SPF, and DKIM protocols to ensure deliverability and prevent phishing.
- Large-Scale Tenant Governance: Administration of a complex environment with 50,000+ users (license optimization, group and RBAC role management).
- Automation & DevOps: Reduction of administration time through the creation of advanced PowerShell scripts for recurring task automation.
- Backup Strategy: Critical data security through the implementation and management of Veeam for Microsoft 365.
- Modern Workplace: Deployment and security of the mobile fleet and workstations via Microsoft Intune (MDM/MAM).
- Havea GroupCloud Systems & Infrastructure Project ManagerAGRICULTUREJanuary 2021 - January 2024 (3 years)Paris, France
- Migration and Hybridization: Management and maintenance of a hybrid environment (60 Windows/Linux servers) and VMware infrastructure optimization.
- Collaboration Expertise: Full deployment of IP telephony solutions via Microsoft Teams (Phone System).
- Network Security: Design and administration of secure network architectures (Cisco Meraki, Fortiguard Firewalls) to ensure high availability of Cloud services.
- Reflex CESIT ManagerDEFENSE AND MILITARYJanuary 2020 - January 2021 (1 year)Lisses, France
- Business Continuity/Disaster Recovery Steering (BCP/DRP): Complete audit, writing, and technical implementation of a Business Continuity Plan (BCP) and a Disaster Recovery Plan (DRP) to ensure the availability of critical data.
- Documentation Engineering (DEX): Exhaustive writing of Operating Dossiers (DEX) and technical procedures to ensure skills transfer and the sustainability of system and network operations.
- Critical Security: Design and deployment of hybrid backup strategies and IT security policies to protect the company's vital assets.
- Maintenance in Operational Condition (MOC): Proactive infrastructure management, including hardening of Windows servers and rigorous application of security patches.
- IT Governance & Budget: Direction of the complete IT procurement cycle and budget optimization to align the infrastructure with the company's business needs.
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Education
- Professional Degree in IT SecurityUniversité Gustave Eif el2019Licence Professionnelle en Sécurité Informatique
- BTS Services Informatiques aux Organisations (SIO - SISR)Université Gustave Eif el2018BTS Services Informatiques aux Organisations (SIO - SISR)
Certifications
- Microsoft Certified: Azure FundamentalsMicrosoft2023