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Mathieu Le GuévelML

Mathieu Le Guével

Data Governance & Marketing Effectiveness Lead

€700/day
Paris 18e Arrondissement, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Mathieu

I make data reliable for marketing decisions.
With over 15 years in acquisition, analytics, CRO, and data governance, I've seen how unreliable data slows down decisions and leads to bad investments.

I help organizations to:
→ Fix marketing data quality at the source
→ Align teams on the KPIs that truly matter
→ Prepare data for MMM and advanced measurement models
→ Interpret results and formulate investment recommendations
→ Deploy governance that is actually used

My goal is simple: transform data into reliable and actionable marketing decisions.
  • English

    Fluent

  • French

    Native or bilingual

Can work on-site
Paris 18e Arrondissement (up to 10km)

Experience

  • Disneyland Paris
    Data Catalog & Governance Consultant – OpenMetadata
    ENTERTAINMENT AND LEISURE
    October 2025 - December 2025 (2 months)
    Paris, France
    Situation:
    Data Governance had just been launched in the organization, without a structured framework or centralized catalog. Critical assets were poorly documented, and roles (Owners, Stewards) were not formalized.

    Tasks:
    Design and deploy in 3 months an operational governance model, a Data Catalog (OpenMetadata), and a Data Stewardship program activated and adopted by the teams.

    Actions:
    - Business scoping and structuring of Data Domains
    - OpenMetadata configuration (connectors, glossary, lineage, data quality)
    - Implementation of rituals, training of stewards, KPI monitoring

    Results:
    ✅ 90% of critical assets documented in 3 months
    ✅ 15+ Data Stewards trained and engaged
    ✅ Governance activated and catalog in production
    Data Governance Data Steward Data Catalog open metadata
  • Pernod Ricard
    Global Marketing Data Governance - Data Steward
    AGRICULTURE
    May 2023 - June 2025 (2 years and 1 month)
    Paris, France
    Situation:
    The marketing data ecosystem was complex and heterogeneous (multi-market), with insufficient data quality and poorly adopted HQ processes. Marketing Mix Modeling (MMM) and dashboards were underutilized due to a lack of clear standards and defined responsibilities.

    Tasks:
    Structure the Marketing Data Domain, secure the data feeding the MMM, and improve the adoption of governance standards across 15+ markets.

    Actions:
    - Data lifecycle mapping and identification of critical data
    - Definition of standards (naming conventions, business glossary) and roles
    - Implementation of quality monitoring (Power BI), training, and animation of the Data Stewards community

    Results:
    ✅ -50% on data collection duration
    ✅ +14 points of compliance on naming conventions
    ✅ Reinforced adoption of HQ standards in 15+ markets
    Data Governance Data Steward Marketing Effectiveness
  • axa
    Product marketing manager
    BANKING AND INSURANCE
    September 2022 - March 2023 (6 months)
    Nanterre, France
    Supervision and coordination of a team of 12 peopleresponsible for the "business" part of the Axa.fr website as well as the digital visibility of AXA agencies.

    With my team, we defined the priority evolutions to be made to Axa.fr (having a business or user experience impact, or meeting legal constraints) and collaborated with the IT team to study their feasibility and ensure their deployment.

    We also defined a 3-year strategy and roadmap to continue the digital transformation of AXA agents, through the deployment of agency websites, management of their Google My Business listing, animation of their social networks, etc.
    Team Management Product management

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