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Daniel DeboisDD

Daniel Debois

Expert Excel: Multi-source data consolidation

€450/day
Paris, FR
3-7 years

Average response time: A few days

Freelancer profile translated to English.
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About Daniel

Do you spend hours consolidating Excel files, correcting errors, and trying to understand data from multiple sources?

I help businesses transform scattered data into a single, reliable source of truth, enabling them to save time, eliminate reporting errors, and make confident decisions.

With years of experience in complex data management within the SEGAS RAILS group, I have developed recognized expertise in data consolidation, structuring, and validation.

Recently, I consolidated over 50 sales files for a real estate agency. The result: a fully centralized and reliable reporting system that eliminated repetitive manual tasks, improved data quality, and provided immediate visibility into key business indicators.

What I can do for you:

✔ Consolidate your data from multiple files, sources, and formats into a single, perfectly structured Excel database.

✔ Clean, organize, and harmonize your data to ensure its consistency and reliability.

✔ Design clear and intuitive structures that facilitate daily data entry and use.

✔ Verify, audit, and correct formulas to eliminate calculation errors.

✔ Control and validate your data to ensure its accuracy and integrity.

✔ Establish a solid foundation for your reports, dashboards, and decision-making analyses.

Formats and environments mastered:

• Excel (XLSX, XLS)

• CSV

• SQL Databases (MySQL, PostgreSQL, Oracle DB)

• JSON, XML

• REST, Graph, and SOAP APIs

• PDF, DOCX, TXT

• EDI and IDoc standards

Why work with me?

✔ Proven experience in managing large volumes of data.

✔ Rigor and attention to detail.

✔ Reliable and scalable data structures.

Contact me today to discuss your project.
  • French

    Native or bilingual

  • English

    Conversational

Remote only
Primarily works remotely

Experience

  • BE-FOR-YOU
    Data Entry and Management Assistant – Excel
    August 2025 - October 2025 (2 months)
    I designcustom Excel spreadsheetsfor data tracking and workflow optimization, for businesses and freelancers.

    My services include:

    • Design and structuring of Excel sheets tailored to business needs
    • Implementation of clear and automated tracking sheets (activity tracking, inventory, customer data, etc.)
    • Organization and formatting of data to improve readability and usability
    • Workflow optimization to reduce manual tasks
    • Data validation to limit errors and inconsistencies

    These tasks allowclients to save time, improve their organization, and significantly reduce errors in their daily data management.
    Data Science Microsoft Excel Correction Data Analysis Formula Correction
  • Analytics Studio
    Administrative Assistant
    CIVIL ENGINEERING
    January 2025 - March 2025 (2 months)
    Owendo, Gabon
    I develop complex Excel formulas and functions (VLOOKUP, HLOOKUP, INDEX, MATCH, SUMIFS, etc.) to automate calculations and improve workflow efficiency, primarily for businesses and freelancers.

    My services include:

    Development of advanced Excel formulas to automate calculations and reduce data processing time
    Use of functions such as VLOOKUP, HLOOKUP, INDEX, MATCH, SUMIFS to meet specific needs
    Optimization of Excel files to improve workflow efficiency and data reliability
    Data preparation and structuring to ensure accuracy and consistency
    Organization and formatting of results for easy reading and analysis

    These tasks allow clients to reduce errors and optimize their work processes through high-performing and reliable Excel files.
    Microsoft Excel Excel Sheet Structuring and Organization Advanced Excel Excel Formulas Data Analysis
  • ROYAL SERVICES
    Data Manager
    CIVIL ENGINEERING
    September 2024 - December 2024 (3 months)
    Libreville, Gabon
    I manage and organize large Excel databases, ensuring their accuracy and efficiency.

    My services include:

    Data entry and updates in Excel
    Sorting, filtering, and structuring information for better readability
    Formatting Excel files to create clear and usable tables
    Data organization to ensure consistency and reliability
    Preparation of files ready for analysis and reporting

    These tasks allow clients to save time, reduce errors, and have clear, structured data to facilitate decision-making and operational monitoring.
    Excel Data Entry Microsoft Excel Advanced Excel Data Analysis Excel Sheet Structuring and Organization

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Education

  • Bachelor's Degree
    Higher Institute of Technology of Owendo (ITO)
    2020
    ACHATS et SUPPLY CHAIN
  • Bac A1
    Lycée Colbert le Grand
    2017
    Baccalauréat d'enseignement général semi-scientifique

Skill set

Categories