John Castle, former superintendent of schools for the North Country Supervisory Union, has been named executive director of the Vermont Rural Education Collaborative. He succeeds Margaret Maclean, a 20-year VREC employee who served the last four years as executive director.

Kristin Sullivan, executive director of the Ward Foundation, a nonprofit that staffs and operates the Ward Museum of Wildfowl Art at Salisbury University in Maryland, has been named executive director of Retreat Farm in Brattleboro. Sullivan, who will begin her new position in October, succeeds Buzz Schmidt, who founded and has led the organization since 2016.