Freelancer profile translated to English.

Description

Senior analyst with 15 years of experience in data and process analysis in regulated environments (telecoms, energy, public services, industry). Expert in Excel (advanced modeling, Power Query, VBA), Power BI (DAX, RLS via Azure AD), SQL (Oracle, Teradata, PostgreSQL).

AI-native workflow: I integrate LLMs (Claude, GPT, Llama, Mistral) into my analytical pipelines to automate the extraction and structuring of unstructured data, accelerate the analysis of complex documents, and enrich business reports. I also operate a custom LLM infrastructure (FastAPI, local Llama and Mistral deployment) for projects requiring large-scale processing or confidentiality constraints.

Rare combination on the market: 15 years of classic data expertise in regulated environments, and operational mastery of LLMs for modern analytical workflows.

Registered Swiss company (GRDProcess Sàrl). Full remote.

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent
Dutch
Fluent

Workplace preferences

Remote only

Primarily works remotely

GRDprocess
Owner - Analyst - Developer - Artificial Intelligence
CONSULTING AND AUDITS
January 2026 - Today (7 months)
GRDprocess Sàrl - Independent Analyst & AI-Native Analytical Tools Developer
Consulting & Audit, January 2026 - Present
Development of AI-native analytical pipelines for large-scale complex document processing. Design and deployment of analytical web applications accessible via API (structured extraction, normalization, multi-criteria analysis).
Stack operated autonomously: Python, FastAPI, Llama and Mistral in local deployment (Infomaniak), multi-model prompt engineering, JSON, SQLite, REST API.
Representative mission: automated structural analysis of 47 prescriptions extracted from an AI governance document, with validation of the analytical architecture on a real case.
Artificial Intelligence Data Analysis Reporting & Analysis JSON Python
Altis
Business Analyst – Expert Excel
ENERGY AND UTILITIES
January 2023 - November 2025 (2 years and 10 months)
Martigny-Ville, Switzerland
Business Analyst for digital transformation projects (ERP, CRM, GIS). Company's Excel referent — "ask Gaetan" was the standard answer for any complex Excel need.
Achievements:
Annual reports for legal reporting (taken over a blocked invoicing process)
Design of the budgeting process in support of accounting
Restructuring of water utility data (consolidation of a massive Excel history)
Project financial tracking file for the infrastructure team
Environment: Advanced Excel, SQL, Power Query
Microsoft Excel Business Analysis ERP Data Analysis Reporting & Analysis
Proximus
Expert Excel – Data Analyst
TELECOMMUNICATIONS
February 2017 - December 2025 (8 years and 10 months)
Bruxelles, Belgium
Design and maintenance of all Excel reports for monitoring B2B fiber deployment (~4,000 companies/year). Excel referent for Local Project Leaders — refreshing, correcting, and evolving operational monitoring reports.
Informal point of contact for complex data requests — management queries regularly ended up on my desk, even outside my scope, because "Excel is Gaetan's thing".
Achievements:
Lead time reduced by 50% thanks to steering dashboards
Tasks behind schedule reduced by 20%
Creation of the first end-to-end process visibility
Reports taken over by the DWH team for Power BI migration (proof of business value)
Environment: Advanced Excel (complex formulas, Power Query, VBA), SQL (Oracle, Teradata, PostgreSQL)
Microsoft Excel SQL KPI Dashboards Process Design ETL