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.
Fiona Y.
Fiona is an NSF Graduate Research Fellow and PhD candidate in Mathematics at Cornell. She holds a BA in Mathematics (cum laude) from Harvard and an MS in Mathematics from Cornell.
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.