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Marius ArnaudMA

Marius Arnaud

Microsoft 365 / Modern Workplace Consultant

€480/day
2 projects
Challans, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Marius

Microsoft 365 & Modern Workplace Consultant, I support CIOs and IT teams in stabilizing, optimizing, and industrializing Microsoft 365 environments in large enterprises and critical infrastructure contexts.

Freelance since June 2023, I have been working for over 2 years at Crédit Agricole – Groupe Infrastructure Plateforme, within teams responsible for services with high business exposure. I contribute to the operational maintenance, continuous improvement of Microsoft 365 services, and the reliability of large-scale usage.

My positioning is at the interface between operations, automation, and service quality: I favor robust, documented, and sustainable solutions, adapted to structured and regulated environments.

Key expertise:
  • Advanced Microsoft 365 Administration (Exchange Online, Teams, SharePoint, OneDrive)
  • Identity and Access Management (Azure AD / Entra ID)
  • L2/L3 Support and complex environment operations
  • PowerShell automation for industrialization and reduction of manual tasks
Added value for my clients:
  • Quick autonomy in existing environments
  • Strong integration capacity within infra / production teams
  • Service quality, stability, and user experience oriented vision
  • Strict adherence to processes (ITIL, security, compliance)
I am looking for medium to long-term assignments where my Microsoft 365 expertise and large enterprise experience can bring a lasting and measurable contribution.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Challans (up to 30km), Nantes (up to 20km), La Roche-sur-Yon (up to 20km), Les Sables-d'Olonne (up to 20km)

Experience

  • Crédit Agricole-GIP
    Softphony/Teams Expert
    BANKING AND INSURANCE
    July 2023 - Today (2 years and 11 months)
    Nantes, France
    Deployment and operational maintenance of softphony on Microsoft Teams.
    Deployment of the Microsoft Teams softphony solution for 15,000 users for a group entity.
    Creation of Power BI reports on solution usage.
    Creation of PowerShell scripts for automating recurring tasks.
    Training new employees on Teams softphony.
    Microsoft Teams Microsoft Power BI Powershell Entra ID Scripting
  • IMA TECHNOLOGIES
    Microsoft 365 Consultant
    BANKING AND INSURANCE
    October 2021 - December 2022 (1 year and 3 months)
    Nantes, France
    Support for the internal team in managing the Microsoft tenant (6,000 users) as well as level 3 incident management on Microsoft 365 tools.
    Governance of Microsoft Teams with the creation of PowerShell scripts.
    Assistance in creating Microsoft Bookings forms.
    Microsoft 365 Microsoft Teams Technical Support Governance Powershell
  • EXAKIS NELITE
    Modern Workplace Consultant
    DIGITAL AND IT
    August 2021 - May 2023 (1 year and 9 months)
    Nantes, France
    Support clients in defining their needs, migrating, and deploying their Microsoft 365 services with a focus on security and continuous improvement to align all their collaboration tools.
    Deepened documentation writing skills.
    Microsoft 365 Microsoft Teams Active Directory Powershell Microsoft Intune

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Education

  • BTS Information Systems for Organizations, Computer Science
    Notre Dame du Roc
    2018
    BTS Système d'information aux organisations, Informatique

Certifications

Skill set

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