Tuana G.

About Tuana G.

Results-driven Senior BI Engineer with 6+ years of experience designing and delivering enterprise BI and analytics solutions across finance, operations, manufacturing and construction environments. Strong expertise in Power BI, DAX, semantic models, and dimensional data modeling, with hands-on experience across the Microsoft Azure data platform.Technical expertise includes:• Power BI (DAX, Power Query, Semantic Models, Import & DirectQuery, Composite Models, RLS/OLS, Incremental Refresh, Performance Optimization)• Data Modeling (Star Schema, Fact & Dimension Tables, SCD Type 1/2, KPI Standardization, Time Intelligence)• Azure Analytics (Azure Synapse Analytics, Serverless SQL Pool, ADLS Gen2, Azure Data Factory)• BI Engineering & ETL (ETL/ELT pipelines, incremental loading, data quality, CI/CD with Azure DevOps)Experienced in building scalable, high-performance BI solutions from data ingestion through curated analytics layers and executive dashboards. Proven ability to optimize data models, reduce refresh and query times, and deliver secure, enterprise-ready reporting solutions for large business user groups.

Experience

1. Senior Bi Engineer

   KELLER

   May 2023 — Present · Tampa, FL, US

   Developed enterprise Power BI reports and dashboards for construction project analytics, serving 200+ business users across finance, operations, and project management• Created standardized Power BI report templates and Business Requirements Documents (BRD) to ensure consistency and accelerate report development across teams• Designed enterprise semantic models with star schema design, optimized relationships, and calculation groups for consistent KPI definitions across the organization• Built complex DAX measures for project profitability, YoY/MoM comparisons, and time intelligence calculations using CALCULATE, FILTER, SUMX, DATEADD, PARALLELPERIOD• Implemented Row-Level Security (RLS) and Object-Level Security (OLS) for dynamic data access based on user roles, regional permissions, and project assignments• Configured incremental refresh policies with detect data changes, reducing refresh time by 65% and enabling near real-time data availability• Optimized Power BI concurrency and optimized semantic model performance using DAX Studio and Performance Analyzer, reducing average query time by 70%• Created Paginated Reports using Power BI Report Builder for pixel-perfect project cost reports and invoices with scheduled email delivery• Built data lakehouse initiative on Azure Synapse Analytics with medallion architecture (Bronze/Silver/Gold) in ADLS Gen2 using Delta Lake format• Built Power BI semantic models with Import Mode connecting to Synapse Serverless SQL Pool (LDW) for optimized query performance and scheduled data refresh• Developed Azure Data Factory pipeline development, supporting metadata-driven ingestion framework with parameterized datasets and control tables• Administered Power BI workspaces and Gateway configurations, managing dataset scheduling, access permissions, and capacity monitoring across 30+ published reports and 10+ semantic models

Education

• Uludag University

  Bachelor's degree