Walker
Walker earned his undergraduate degree in applied math from Columbia University and later finished a master's degree in statistics from Duke University. He now works for the New York Yankees as a quantitative analyst in their front office.
Sam
Sam holds a BS in Physics (Cornell) and a PhD in Physics (Harvard). He's now a postdoctoral researcher at the University of Pennsylvania, studying physical systems and machine learning applications.
Sally
Sally is a software engineer at an EdTech company in Boston. She has a BA from Princeton University in Computer Science, where she researched high school computer science pedagogy and curriculum.