Lillian Elek — Data Professional

Welcome to my portfolio! I'm a Data Professional with a Master's in Business Intelligence & Data Analytics and 5+ years building robust data systems. I combine hands-on analytics and engineering expertise with growing machine learning capabilities to solve complex problems.

My foundation in SQL, Python, Power BI, and Azure Pipelines enables me to deliver end-to-end solutions—from data infrastructure to predictive modeling. I specialize in regression analysis, hypothesis testing, and statistical modeling, with experience in clean-energy and SaaS domains. I'm passionate about bridging the gap between traditional analytics and advanced data science.

Analytics dashboard preview

Featured Projects

Below are a few projects demonstrating my skills across Python, Tableau, and SQL. Check out my Projects page to dive deeper into my data science and analytical capabilities!

Data to Diagnosis: Logistic Regression for Stroke Risk

Data to Diagnosis: Logistic Regression for Stroke Risk

Can patient demographics and health indicators identify stroke risk early? This project uses logistic regression with class balancing, assumption checks, and threshold optimization to prioritize high-recall screening in a real-world, imbalanced healthcare dataset.

PythonLogistic RegressionMLscikit-learn
AdventureWorks SQL Basics

AdventureWorks2019 Database (SQL)

Contains SQL Code for everyday use and general understanding. Window functions, CTEs, Indexing, and more.

SQLCTEsWindow Functions
Energy Demand Forecasting

Tableau Visuals

Repository of all my Tableau visuals

TableauTime Series