Mr. Valitutto joined the St. Mark’s faculty in 2017 after teaching for seven years at Kent School and at Cushing Academy for five. At St. Mark's, Mr. Valitutto teaches courses in math research, statistics, and pre-Calculus, as well as running Saturday classes for math team and board game design. Additionally, he coaches football and JV girls' basketball. Mr. Valitutto is a graduate of Alfred University where he majored in math and chemistry and competed on the track team in the throwing events.

Maggie Kelly joined St. Mark’s as a Biology teacher and crew coach in the Fall of 2020. She is an alumna of Teach For America for which she was a Corps Member in Boston. Maggie has a Masters in Education from Boston University and a BA from Georgetown University, where she was captain of the varsity sailing team. She was excited to return to a boarding school community, having graduated from Middlesex School in 2013 and lives in an upperclassmen girls' dorm, Gaccon, at St.Mark's. Maggie enjoys spending time in the outdoors, snowboarding, and baking for friends and family.