Mark re-joined the Deerfield faculty in 2015 after initially teaching and coaching at DA from 2007-2011. He has taught as a Peace Corps volunteer in Burkina Faso, at a public magnet school in Maryland, at a public charter school in Massachusetts, and at a small public high school in Massachusetts. He is the head coach for varsity girls volleyball and he currently serves as an assistant dean of faculty. He lives in O’Byrne Curtis dormitory with his two children.