Dylan Bretz Jr.        dylanbretzjr@gmail.com || +1 (330) 523-8886 || Cleveland, OH

SUMMARY

Detail-oriented professional transitioning from a background in music to data analytics, bringing a unique blend of analytical, creative and critical thinking. Experience using spreadsheets, SQL, Python, R, and Tableau with a proven ability to quickly master new skills and adapt to new workflows. Eager to combine strong technical, problem-solving, and communication skills with a passion for transforming data into meaningful insights.

PROJECTS

Minecraft Villager Trading Database: System Design and Implementation        February 2026

• Designed and implemented a normalized relational database using SQLite and Python, including automated ETL from external game source files, a CLI tool for validated data entry, and analytical SQL queries to identify gaps, compare records, and support informed decision-making.

Cyclistic Bike-Share Data Analysis with Python Case Study        January 2026

• Analyzed bike-share data from Chicago using Python to understand how different types of customers used bikes differently and what that suggests for converting casual riders into annual members.

CERTIFICATIONS & SPECIALIZATIONS

Google Data-Driven Decision Making Specialization, Coursera        January 2026

• Employed structured problem-solving to validate data integrity and transform raw data into actionable insights using spreadsheets and Tableau, leveraging generative AI to optimize data workflows.

Google Data Analysis with Python Specialization, Coursera        November 2025

• Applied Python (pandas, NumPy, Matplotlib, seaborn) to professional data analysis workflows, including cleaning, transforming, analyzing, and visualizing data to generate insights and inform decision making.

Google Data Analytics Professional Certificate, Coursera        November 2025

• Completed comprehensive 9-course program with 150+ hours of coursework covering the entire data analysis process, including collecting, cleaning, transforming, analyzing, and visualizing data.
• Conducted hands-on case studies analyzing real-word datasets using spreadsheets, SQL, R (tidyverse, dplyr), and Tableau to identify trends, solve problems, and deliver data-driven recommendations.

SKILLS

• Proficiency in data extraction, cleaning, and analysis using SQL, Python, and R
• Visualizing data insights and building dashboards using Tableau, spreadsheets, Python, and R
• Skilled using Microsoft Office for spreadsheets, reporting, and presentations
• Proficiency with advanced spreadsheet techniques (functions/formulas, pivot tables, data validation)
• Presenting actionable, data-driven insights through clear visualizations in slide decks and reports
• Familiar with cloud analytics workflows (BigQuery, Azure, AWS) and working with large databases
• Using Git and GitHub for version control and team collaboration (branching, commits, pull requests)

Technical languages: SQL, Python (NumPy, pandas, Matplotlib, seaborn, Plotly), R (tidyverse, dplyr, ggplot2), JavaScript, JSON, HTML/CSS, LaTeX, Markdown, YAML

Software: Microsoft Office (Excel, PowerPoint, Word), Google Workspace, BigQuery, Tableau, RStudio, Spyder, VS Code

Operating systems: macOS, Windows, Linux

Languages: English (native/fluent)

EXPERIENCE

Data Annotator / AI Trainer | Cleveland, OH        February 2025 – September 2025

• Evaluated over 1,000+ multimodal model outputs (text, audio, image, video, documents, etc.), rating and ranking responses for accuracy, relevancy, safety, instruction-following, and writing quality.
• Generated high-quality, original content for training LLMs across a variety of use cases.
• Reviewed, flagged, and corrected worker submissions, ensuring quality, accuracy, and consistency.

Musician, Music Producer, Music Educator | Cleveland, OH        January 2016 – Current

• Performed extensively in diverse musical settings, exhibiting a deep understanding of genre and style.

• Produced, mixed, and mastered music spanning electronic, instrumental, and popular genres, applying critical listening and technical expertise in a variety of DAWs and cutting-edge music production tools.

• Delivered constructive feedback and clear instruction to hundreds of students in classes, private lessons, and workshops, focusing on  improvisation, theory, and performance techniques.

BGSU - Graduate Assistant / Teaching Assistant | Bowling Green, OH        August 2021 – May 2023

• Assisted department faculty by instructing classes, leading rehearsals, preparing course materials, grading assignments, facilitating discussions, and acting as a liaison between students and faculty.
• Maintained an active studio for private bass instruction emphasizing fundamentals and improvisation.

EDUCATION

Bowling Green State University | Master of Music (M.M.) in Jazz Studies | GPA: 3.903 / 4.0        May 2023

Activities: Graduate Assistant, Teaching Assistant, Music Librarian, Jazz Band, Early Music Ensemble

Bowling Green State University | Bachelor of Music (B.M.) in Jazz Studies | GPA: 3.975 / 4.0        May 2021

Awards: Magna Cum Laude, Presidential Scholar, Bob Sebo Jazz Scholarship, E. Printy Arthur Scholarship

Activities: President of Student Jazz Association, Honors College, Philharmonia, Jazz Band, Chamber Music