Skills
What I use to go from raw, messy data to a decision someone can make.
SQL / PostgreSQL
Joins, aggregations, CTEs, window functions (RANK, PARTITION BY), correlated subqueries, schema design.
Advanced Excel
PivotTables/PivotCharts, INDEX/MATCH, XLOOKUP, SUMIFS/COUNTIFS/AVERAGEIFS, IFS logic, Power Query.
Power BI
Data modeling and dashboarding for stakeholder-facing reporting.
Tableau
Interactive visualization and exploratory dashboards.
Python
pandas for cleaning and reshaping data, matplotlib/seaborn for visualization, Jupyter for exploratory analysis.
pandas & NumPy
DataFrames, groupby aggregation, merges and joins, missing-value handling, vectorized operations.
Git & GitHub
Version-controlled, documented portfolio projects with public READMEs.
// Databases & Querying
// Spreadsheets & BI
// Python for Data Analysis
Active learning area — currently applying pandas to the same cleaning and analysis problems I solve in Excel and SQL.