Denis Maguire has a Master of Arts in Teaching from New York University. He majored in Mathematics with a minor in Educational Studies at Bowdoin College. Before joining Chapin, he taught at The Dublin School in New Hampshire, where he was a math teacher, math department head, and head coach of the ultimate frisbee team. While completing his master's at NYU, Denis taught at Brooklyn Prospect Charter School, and he also served as a math fellow at the Klingenstein Summer Institute at Teachers College, Columbia University. When Denis isn't teaching math, he's usually playing ultimate, skiing, doing CrossFit, listening to podcasts or singing.