David Scott Sinnott WG91, 58, of Wellesley and Duxbury, MA, passed away on December 12 of complications following a massive heart attack. He was an avid sportsman — skier, hiker, marathoner — whose illness was unexpected. He had a storied career, most recently as a financial services consultant, and had begun serving as a Year Up mentor in Boston. He is survived by his wife, Francesca; a daughter, Olivia; and a son, Charlie.