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Tillman Rexrode in a suit and red tie

Statistics and economics student. Data person.

I study statistics and economics at UC Santa Cruz, class of 2029. I got into data by building a tennis prediction model on my own, and now I do research on campus, analyze ticket sales, and help local businesses read their numbers.

  • 3.9 GPA, Dean’s Honor Roll in Fall 2025 and Winter 2026
  • Bayesian Statistics certificate, UC Santa Cruz on Coursera
  • Member of the UCSC Startup Club
Next: Volleyball

Experience

  1. Winter and Spring 2027

    Data intern, Joint Venture Silicon Valley

    Incoming. Data work for a nonprofit that brings together business, government and community leaders across Silicon Valley.

  2. Sep 2026 to now

    Undergraduate research assistant, UCSC Fisheries Collaborative Program

    Testing whether genetically similar Pacific salmon populations share the same dynamics across 743 populations. I wrote a Python script that matched raw waterbody names to their rivers and tagged each match with a confidence level for review.

  3. 2026 to now

    Founder, data consulting, Independent, Santa Cruz

    Dashboards and financial analysis for local businesses. Now cleaning and analyzing data for a Carmel-area restaurant.

  4. Jan to Sep 2026

    Data analyst, Six String Society, San Diego

    Combined ticket sales from a 50-event slate into one view, analyzed sell-through by price tier, timing and venue, and automated the reporting in Python and SQL.

I also work as a server at Kianti’s Pizza & Pasta Bar in Santa Cruz, and spent two years serving at Super Sushi in Carlsbad, so I know how a restaurant runs from the floor.

Skills

Languages and tools

  • Python
  • pandas
  • NumPy
  • scikit-learn
  • XGBoost
  • SQL
  • R
  • Excel
  • Power BI
  • Tableau
  • Streamlit
  • Git
  • Jupyter
  • AI-assisted workflows
  • Adobe Photoshop

Methods

  • Machine learning
  • Predictive modeling
  • Feature engineering
  • Exploratory data analysis
  • Regression
  • Time series
  • Forecasting
  • Data cleaning
  • Data visualization
  • Statistical analysis

Other

  • Intermediate Spanish
  • CPR certified

Awards and activities

  • Dean’s Honor Roll

    UC Santa Cruz

    Fall 2025, Winter 2026

  • Bayesian Statistics: From Concept to Data Analysis

    UC Santa Cruz on Coursera

    Sep 2026

  • NCCVL Division II champions

    UCSC men’s club volleyball

    2026

  • CIF San Diego Section champion

    Mission Vista High School volleyball

    High school

  • Timberwolf Award

    Mission Vista High School

    2025

  • Project Lead the Way, 4-year honor student

    Mission Vista High School

    2021 to 2025

  • California Scholarship Federation

    Mission Vista High School

    2024 to 2025

  • Club president, beach volleyball and pickleball

    Mission Vista High School

    2024 to 2025

  • Varsity rugby, volleyball and beach volleyball

    Mission Vista High School

    2021 to 2025

Coming soon

My goal: an AI app that makes running a local business easier.

I am building an application that uses new AI workflows to take the busywork off local business owners: reading their sales, costs and menus, and turning them into clear next steps.