The school's current principal is Laura Mackler, with Stephanie Koekkoek as the vice-principal.

The school has a gymnasium, library, large guidance and special education departments, five science classrooms, four English classrooms, a construction lab, music room and a stage/drama room.

St. Mary also features a "cafitorium" (auditorium that is transformed into a cafeteria).

The school day commences at 8:05 am and concludes at 2:08 pm.

Unlike the local public schools, St. Mary only has four periods per day.