Gilmar Telles

Senior Data Analyst & Product Owner

5+ years leading data analysis, dashboard development, ML, and generative AI. Expert in SQL, Snowflake, Power BI, and data modeling.

Curitiba, PR, Brazil

Skills

SQL, Python (Pandas, Scikit-learn, PySpark), Snowflake, Databricks

Power BI, dashboard creation and optimization

Clustering, probability distribution, forecasting, supervised models

ETL pipelines, data modeling, performance optimization

ExxonMobil | Aug 2025 – Present

Developed dashboards used by 1,100+ users across 7 teams; new KPIs and result forecasting contributed to $6M improvement in working capital.
Created generative AI chatbot in Celonis to automate data interpretation for ~150 users, reducing average time to generate insights by 20%.
Built OCR pipeline with Flask and Azure AI Document Intelligence to transform unstructured PDFs into structured spreadsheets, saving 250 hours/month across 4 teams.
Mentored junior analysts and led Power BI, SQL, and Snowflake training for internal communities.
Led a global team of 11 as Product Owner, driving process and system improvements across Supply Chain and Customer Service for over 1,000 employees worldwide.

ExxonMobil | Aug 2022 – Jul 2025

Automated workflows via ETL processes, eliminating 150+ hours/month of manual work and increasing data reliability.
Developed supervised learning model for payment allocation, reducing manual effort by 200+ hours/month and improving financial operation accuracy.
Delivered 100+ hours of Snowflake, Python, and Power BI trainings for global teams.

ExxonMobil | Jan 2022 – Jul 2022

Developed a dashboard to monitor time registration inconsistencies, enabling 8 analysts to resolve errors faster and saving 40 hours/month.