Ciembroniewicz joined SAD 17 four years ago and has also served as acting superintendent since June when Heather Manchester took a position with the Yarmouth School Department. Related Oxford Hills appoints acting school superintendentMarx comes to Oxford Hills from Portland Public Schools, where she was King Middle School principal for the past three years. Related Oxford Hills superintendent departs for Yarmouth post“Amy Marx has traveled the world educating students and leading schools,” SAD 17 board Chair Troy Ripley, of Paris, said. “She will be a great addition to our leadership team and it is a pleasure to welcome her to the Oxford Hills.” Marx’s first day in Oxford Hills will be Aug. 31.