I am seeking a data analyst or marketing analyst role where I can use SQL, Python, Power BI, Excel, and R to analyze customer behavior, measure performance, and support business decisions. My experience includes retail, e-commerce, and portfolio projects such as Quantium and Cyclistic, and I showcase my work through GitHub and my data portfolio.
Ethan Johnson
@ethanjohnson1
Data analyst skilled in SQL, Python, and Power BI who turns data into actionable business insights.
What I'm looking for
I am a data analyst with experience in SQL, Python, R, Power BI, and Excel, focused on transforming raw data into clear business insights. My projects include Cyclistic bike-share analysis and Quantium’s retail analytics simulation, where I analyzed large datasets to identify trends, customer behavior, and growth opportunities. I also founded an e-commerce clothing brand and used analytics to improve acquisition, engagement, and conversion. My work is showcased through GitHub and my data portfolio.
Experience
Work history, roles, and key accomplishments
Data Analytics Virtual Experience
Quantium
Feb 2026 - Mar 2026 (1 month)
Analyzed 252K+ retail transactions and 72K+ customer records in R to identify purchasing trends, segment performance, and growth opportunities. Used Python to evaluate 3 store-layout trials through uplift testing. Delivered a client-facing PowerPoint with visualizations and recommendations on promotions, pack sizes, multi-buy offers, and rollout strategy.
Analyzed product trends to support stocking, reordering, and shelf availability. Balanced 10 rotating responsibilities, including inventory review, donations, 240+ daily packages, and customer support. Troubleshot store hardware and software, resolving order, barcode, and inventory issues. Trained new hires on daily processes to improve speed, accuracy, and consistency.
Founder & Owner
Yeden
Nov 2021 - Jan 2026 (4 years 2 months)
Founded and managed a direct-to-consumer clothing brand, increasing customer engagement 60% through targeted social media campaigns and driving a peak of 718 monthly store sessions while maintaining a 3% conversion rate.
Systems Developer (Project)
Hospital Appointment System
Apr 2023 - May 2023 (1 month)
Led development and testing of a secure hospital appointment system using SQL and MS Visio, designing ER models and data flows and ensuring reliable handling of patient and appointment data.
Data Analyst (Project)
NBA Athlete Endorsement Analysis
Feb 2026 - Present (1 month)
Built a data-driven endorsement scoring model using SQL and Python to rank NBA athletes by endorsement upside and delivered multi-page Power BI dashboards to inform targeting and brand opportunities.
Data Analyst (Case Study)
Cyclistic Bike Share Analysis
Jan 2026 - Present (2 months)
Analyzed multi-year bike-share data with SQL and Power BI to compare casual vs. member usage, uncovering behavioral differences to inform membership conversion and targeted marketing strategies.
Education
Degrees, certifications, and relevant coursework
California State University, Fullerton
Bachelor of Science, Information Systems and Decision Sciences
2019 - 2023
Grade: 3.83 GPA, magna cum laude
Activities and societies: Dean's List (2019-2023); member of Delta Sigma Pi (marketing, scholarship, recruitment, interchapter, finance, social committees).
Graduated magna cum laude with a cumulative GPA of 3.83 while completing coursework in information systems and decision sciences and making the Dean's List.
Tech stack
Software and tools used professionally
Availability
Location
Authorized to work in
Portfolio
datascienceportfol.io/ethanj360Social media
Job categories
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