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Data Warehouse & Dimensional Modeling

A poorly designed warehouse accumulates technical debt faster than any other part of the stack. I design data models with the right grain, the right structure, and the right tradeoffs documented — so your team can build on top of them for years.

What’s Included

  • Dimensional modeling and star schema design
  • Warehouse setup and configuration (BigQuery, Redshift)
  • Staging layer design and source alignment
  • Mart layer modeling for business domains
  • Metrics layer design for consistent KPI definitions

Platforms

BigQuery · Redshift · Python · Spark · Airflow

I design for the questions the business is actually asking — not the schema that was easiest to load.

Data Warehouse Design

Warehouse architecture and data modeling that scales — star schemas, OBTs, and governance frameworks built for the long term.

Christopher A. Rotunno Grounded in Analytics

Data analytics engineer and BI leader. Building pipelines, models, and dashboards that turn raw data into clear decisions.

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