Sergio Velazquez

At Wells Fargo, I build and maintain Tableau analytics systems for high-volume, compliance-driven reporting. I resolved a critical reporting bottleneck, reducing workbook render times from 8–15 minutes to near-instantaneous through upstream aggregated layers, data modeling, and performance tuning.

I architected high-availability Tableau Server infrastructure with automated failover and redundancy for business-critical analytics workflows. I also established enterprise Tableau governance covering access controls, workbook lifecycles, and data source cataloging.

I use Python, SQL, Splunk, and Oracle to map complex schemas, automate recurring work, and improve data reliability. My monthly Tableau workbook archival automation preserved analytics assets otherwise subject to a 90-day inactivity deletion policy, achieving zero data loss.

I partner closely with Data Engineering, Business Intelligence, and business stakeholders to deliver maintainable, client-ready reporting. I also reverse-engineer legacy authorization logic and create documentation that makes complex systems easier for teams to support.