Nour Salepan
Data analyst with an accounting foundation and a demonstrated ability to take messy, real-world data through the full analytics cycle — cleaning and validation, exploratory analysis, and clear reporting for non-technical stakeholders. Google Data Analytics certified, working fluently in SQL (PostgreSQL), advanced Excel, and Power BI.
What I do
My portfolio work includes auditing a 798-row marketing dataset, where the analysis surfaced a reporting error that had inflated headline return-on-spend by 73%. I take a messy, real-world dataset, ask sharp questions of it, and present findings clearly enough that a non-technical stakeholder could act on them — every project here is real, completed work, not a tutorial follow-along.
Outside of self-directed analytics study, I keep the books for a family retail business — daily reconciliation, inventory tracking, and the Excel systems that replaced its paper logs.
Databases & Querying
PostgreSQL, SQL joins, CTEs, window functions, schema design, pgAdmin.
Spreadsheets & BI
Advanced Excel, Power BI, Tableau — pivots, lookups, dashboards.
Analysis & Reporting
Data cleaning, anomaly detection, variance analysis, written insights.
Recent projects
Marketing Campaign Performance
completeAudited a 798-row, 6-channel ad dataset — caught an 89.7x ROAS anomaly that was inflating blended returns by 73%, and quantified $345.5K of underperforming budget.
Car Price Analysis (SQL)
complete13 SQL queries — from data cleaning to window functions and CASE-based price banding — analyzing a real-world car pricing dataset in PostgreSQL.