Meet Stu Warshawer

Ninja Principal Stu Warshawer became a principal at Mastery in June 2014. Before joining Mastery, he served for 10 years as a teacher and dean of students in New York.

Stu has a bachelor’s in Religion from Williams College in Massachusetts, a master’s in Education from Mercy College in New York, and a master's in Education Administration from National-Louis University in Chicago.

He represents Mastery on season 10 of NBC's “American Ninja Warrior,” using the platform to bring attention to educational inequity.

Fun facts:
• Avid rock climber
• Was in a band that opened for rap group Naughty By Nature
• Lived on a glacier in Alaska for 25 days straight

Support the Mastery Harrity Wolfpack

As a lifelong athlete, Principal Warshawer was thrilled to bring an athletics program to his middle school students at Mastery Harrity. Not only do sports programs help students stay in great physical shape, but they also teach kids how to become more self-confident, overcome challenges and work as a team. And because they have to maintain good grades to participate, sports also helps them academically.

Even with all of those benefits, maintaining school sports programs can expensive. That’s why we need your help.

Please consider donating today.

Work at Mastery

Middle school is especially close to our Ninja Principal’s heart, and we’re hiring right now for several very important middle school roles.

Click here for a full list of all of our job openings.