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Johann ViennetJV

Johann Viennet

Head of Data | Data Governance & Operating Model

€800/day
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Johann

Head Of Dataspecializing ingovernanceandBI transformation**, I support **CFOs, CIOs, and business departmentsin structuring reliable, clear, and truly actionable data piloting for teams and the Executive Committee.

I primarily work in complex or multi-entity environments, where BI usage already exists but **indicators are no longer aligned**, repositories diverge, or data projects advance without a **clear decision-making framework**.

My role is to re-align usage, KPIs, and business priorities to securedecision-makingbefore architectural or tooling choices.

I notably support organizations on **data governance, strategic planning**, repository structuring, data/business/IT alignment, and BI usage transformation.

I have supported several large groups in theHealthcare, Industry, Banking, and Insurancesectors in contexts with high stakes in governance, compliance, and performance management.

I am typically called upon when dashboards exist but lack authority,indicators are contested**, or departments need a **shared decision-making visionbefore accelerating their data investments.



**Types of missions**: BI governance, decision-making transformation, strategic planning, data diagnostics, usage structuring, and business department support.


I invite you to consult my career and written recommendations on **LinkedIn**.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Paris (up to 50km)

Experience

  • Air Liquide Healthcare
    Data Strategist / Decision-Making Scoping & Governance
    HEALTH AND WELLNESS
    September 2018 - November 2025 (7 years and 2 months)
    Paris, France
    Data Strategist and Decision Support Consultant mission within a large international healthcare group, highly regulated.

    Intervention upstream of Business Intelligence (BI) and Data projects to scope, structure, and secure the decision-making function:
    - Scoping of business and decision-making challenges (Finance, Operations, Quality, Management)
    - Definition and structuring of KPIs and performance indicators
    - Modeling of repositories and decision-making models
    - Implementation of pragmatic data governance oriented towards usage
    - Securing sensitive data (rights, RLS, compliance)
    - Building BI and data roadmaps aligned with business value

    Interface role between business departments, CFOs, Data, BI, and IT teams, with a strong focus on the reliability of indicators, clarity of reporting, and decision support.

    Mission focused on strategic scoping of data usage, decision-making governance, and performance management, with definition and securing of key KPIs in a highly regulated healthcare environment (HDS).

    Interventions carried out in close collaboration with the financial department (CFO) and steering committees, to ensure the reliability of key indicators presented to the Executive Committee and to secure decision-making choices.
    Data Strategy Data Governance Strategic Planning Performance Management Definition and monitoring of indicators (KPI)
  • Verescence (ex-Saint-Gobain)
    Data Strategist / BI Industrialization
    RAW MATERIALS INDUSTRY
    September 2019 - February 2020 (5 months)
    Paris, France
    Data Strategist mission focused on industrializing decision-making usage in a multi-site industrial context.

    BI diagnostic and decision-making scoping intervention aimed at rationalizing existing Business Intelligence usage, structuring data modeling, and industrializing Power BI reporting.

    Key interventions:
    - Structuring and industrializing Power BI usage
    - Defining modeling and dissemination standards
    - Implementing pragmatic data governance
    - Securing access and sensitive data
    - Rationalizing reports and BI usage

    Objective: Transform opportunistic BI use into a reliable, clear reporting system controlled by the business departments.
    Decision-Making Scoping BI Diagnostics Business Intelligence Data Modeling Microsoft Power BI
  • ADLP Assurances (ADL Partner)
    Data Strategist / BI Insurance
    BANKING AND INSURANCE
    March 2018 - June 2018 (3 months)
    Paris, France
    Supporting Insurance business lines in structuring data usage and decision-making reporting.

    Mission focused on ensuring the reliability of performance indicators, improving data quality, and implementing data governance to ensure reliable decision-making reporting for the Insurance business lines.

    Main contributions:
    - Scoping business needs and decision-making usage
    - Defining key performance indicators
    - Ensuring the reliability of contractual and reporting data
    - Improving the clarity of dashboards
    - Controlling risks related to data quality

    Demanding environment in terms of governance, reliability, and compliance.
    Performance Management Performance Indicators Data Quality Data Governance Data Analysis

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Education

  • Professional Bachelor's Degree - Information Systems & Application Architectures
    Université Claude Bernard Lyon 1
    2006

Skill set

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