Sam Chen
[email protected] • (555) 278-0000 • Seattle, WA • linkedin.com/in/samchen
Professional Summary
Data analyst with 6 years turning complex datasets into decisions that move the business forward. Specializes in Python-based ETL pipelines, SQL optimization, and interactive Tableau dashboards used by executive and operational teams. Consistently recognized for translating data noise into clear, actionable narratives without losing statistical rigor.
Experience
Senior Data Analyst
Cascade Retail Group — Seattle, WA | 2022–Present
- Built an inventory demand-forecasting model achieving 89% accuracy across 12,000 SKUs, reducing overstock costs by USD 4.1M in the first year of deployment.
- Designed and maintain a real-time operations dashboard used by 45+ store managers, replacing 6 disconnected spreadsheets and cutting weekly reporting prep from 8 hours to 20 minutes.
- Ran an A/B testing program for email promotions across a 200,000-subscriber list; incrementally optimized revenue per email from USD 0.22 to USD 0.41 over three cohorts.
- Automated the monthly sales reconciliation pipeline (Python + Airflow), eliminating 12 hours of manual data entry per month and reducing reconciliation errors from 4.2% to 0.1%.
Data Analyst
Vertex Insurance — Portland, OR | 2020–2022
- Developed a churn prediction model with 83% precision, enabling the retention team to prioritize outreach for the top 15% highest-risk policyholders and reduce annual churn by 11%.
- Refactored 40+ legacy SQL queries, reducing average executive dashboard load time from 12 seconds to under 2 seconds across all reporting surfaces.
- Created mobile app onboarding analytics that identified a friction point in step 3 of 5; product team's fix improved Day-7 retention from 22% to 38%.
Data Analyst
Lumina Media — Seattle, WA | 2018–2020
- Built Python scripts to automate weekly audience reporting, saving 5 hours of manual work per week across a 3-person editorial team.
- Identified USD 180,000 in wasted ad spend through placement-level attribution analysis; redirected budget to high-performing placements with 2.8x better CPM efficiency.
Education
B.S. Statistics
University of Washington — 2018
Technical Skills
Languages: Python (pandas, NumPy, scikit-learn), SQL, R •
Databases: Snowflake, PostgreSQL, BigQuery •
Visualization: Tableau, Looker, Excel (advanced, pivot tables) •
Pipelines: dbt, Airflow, Google Analytics 4 •
Methods: A/B testing, regression, forecasting, cohort analysis