These titles overlap more than job postings admit. Here is the concrete
evidence behind each one.
Data Analyst
Writing and optimizing the queries, cleaning what comes back, and answering the ad hoc
question before the dashboard exists. Built validation and anomaly-detection frameworks
that raised data reliability to 93% and cut 8+ hours of weekly manual QA.
Business Analyst
Sitting with stakeholders to turn "we need better visibility" into a defined metric,
an owner and a refresh cadence. Gathered requirements across operations, finance and
faculty teams and translated them into reporting specs and process changes.
BI Analyst
Dimensional models, DAX measures that survive contact with a filter, and dashboards
that load fast enough to be used. Power BI and Tableau in production across healthcare,
manufacturing and education contexts.
Data Scientist
Forecasting, clustering, recommendation and NLP — always benchmarked against the naive
rule the business already uses, with the split designed so the model can't see the
future it's predicting.
- Languages
- Python, SQL, MySQL, PostgreSQL, C++, JavaScript, R, Shell scripting, HTML
- BI & Visualization
- Power BI, Tableau, Looker, Excel, DAX, Power Query, dashboard development,
KPI reporting, executive reporting
- Data & warehousing
- SQL Server, SAP, dimensional modeling, star and snowflake schemas, data migration,
data quality and validation
- Data engineering
- Microsoft Fabric, OneLake, ETL, Apache Spark, Hadoop, Airflow, Kafka, dbt
- Analytics & ML
- Statistical analysis, regression, classification, clustering, ARIMA, NLP, feature
engineering, predictive and supply-chain analytics, forecasting
- Cloud & tools
- AWS (S3, Redshift, Lambda), Azure, GCP (BigQuery, Cloud Run), Git, Docker,
Azure Data Studio, Jupyter, VS Code, HubSpot, REST APIs