Joel Janssen

Sports analytics · Player evaluation · Operations

Turning data into decisions teams can act on.

I build models and reports that help teams evaluate players and prepare for opponents. Head of Hockey Analytics for the Madison Capitols, and a Finance and Information Systems student at the University of Wisconsin-Madison.

Currently working onNFL Big Data Bowl

01

About

I come at sport from three sides: as an analyst, as an operator who has built and run a business, and as a competitor.

Joel Janssen

I'm interested in how teams are built and run, in any sport: how players are valued, how rosters come together and how a staff prepares for the next opponent. My work so far is in hockey; my playing background is in baseball, football and wrestling; my studies are in finance and information systems.

Majors
Finance, Investment & Banking · Information Systems
School
University of Wisconsin-Madison, May 2028
Hometown
Walworth, Wisconsin
i

Analyst

Builds models in R for player evaluation and opponent preparation, and tests them on games they have not seen before trusting them.

ii

Operator

Founded a marine services business with five-figure revenue and more than 50 customers, and manages a marina crew of more than ten.

iii

Competitor

Four-year varsity pitcher and two-time captain who also played football and wrestled. Now pitching and playing outfield for UW-Madison Club Baseball.

Baseball photos: Smokinjoez

02

Experience

Oct 2026 – Present

Head of Hockey Analytics

Madison Capitols · USHL · Internship · Madison, WI

  • Work with the head coach and general manager and the coaching staff on scouting, player evaluation, game preparation and analytics.
  • Develop statistical models and data-driven insights that support player evaluation and strategic decisions.

May 2024 – Present

Founder, Owner and Operator

Jet Marine Management · Seasonal · Fontana, WI

  • Founded and run an independent marine services business with five-figure revenue: detailing, seasonal maintenance, cover installation, valet and boat management.
  • Serve more than 50 customers, handling client acquisition, scheduling, service delivery and relationships.

May 2023 – Present

Abbey Harbor Marina Manager

Gordy's Marine · Seasonal · Fontana, WI

  • Lead marina operations for all of Abbey Harbor: docking, fueling, launching, customer service and waterfront logistics.
  • Manage, train and supervise a team of more than 10 employees.
  • Redesigned staffing and workflows, cutting labor costs by a five-figure amount.
03

Projects

Work done for a team uses licensed data and is internal to that team, so it is described here without results.

2026 · HockeyInternal

Opponent-adjusted team ratings and pre-scout reports

Rates every team in a league on offense and defense after adjusting for the opponents it has faced, then produces a one-page report for each upcoming opponent: projected matchup, strengths, weak spots and a side-by-side profile.

RRidge regressionAutomated reporting

2026 · HockeyInternal

Which metrics can a staff trust?

A study of roughly 250 performance metrics that separates repeatable team traits from game-to-game noise, then checks which traits carry over to results in games they never saw.

RSplit-half reliabilityPermutation testing

2026 · HockeyInternal

What goes with winning: a game-level model

An elastic-net model across every league game that identifies which parts of play go with winning and which lead to a positive expected-goal differential, re-fitted repeatedly so only durable signals are reported.

RElastic netGrouped cross-validation

2026 · Basketball

NBA shot make probability model

A model that estimates the probability an NBA shot is made, using engineered features such as shot distance, shot-clock pressure, catch-and-shoot attempts and defender proximity.

RXGBoostFeature engineering

04

Clubs and involvement

Four sports organizations at the University of Wisconsin-Madison, all since September 2026.

Sports Analytics Club logo

Sports Analytics Club

Selected member

Applying data and modeling to questions across sports.

Sports Business Club logo

Sports Business Club

Selected member

The business side of sport: front offices, finance and strategy.

Wisconsin Sport Consulting Group logo

Wisconsin Sport Consulting Group

Selected member

Consulting projects for organizations in sport.

Joel Janssen on the mound for UW-Madison Club Baseball

UW-Madison Club Baseball

Pitcher and outfielder

Competitive club baseball for the University of Wisconsin-Madison.

05

Research and writing

First article in progress.

Research write-ups, graphics and interactive apps across sports will be published here.

06

Scouting reports

Reports coming soon.

Player and team scouting reports across sports will be posted here.

07

Skills and education

Analytics

  • R
  • Statistical modeling
  • Data analysis
  • Data visualization
  • Microsoft Office

Business

  • Finance
  • Operations management
  • Team leadership
  • Customer relationships
  • Customer acquisition
  • Entrepreneurship
  • Time management

Education

University of Wisconsin-Madison

Bachelor of Business Administration, May 2028
Finance, Investment & Banking · Information Systems

Delavan-Darien High School

Valedictorian · U.S. Presidential Scholar · AP Scholar with Distinction

08

Recognition

Contact

Let's talk sport, research
and how teams are built.