After two decades leading Chesterfield Central School, Sharyn D’Eon has been named assistant superintendent for SAU 29, succeeding Brian Campbell. Sharyn D’Eon, pictured here with Robb Malay, SAU 29 superintendent, has been promoted to assistant superintendent for the Keene School District. CHESTERFIELD, N.H. (MyKeeneNow) After spending two decades as principal of Chesterfield Central School, veteran educator Sharyn D’Eon has stepped into a new leadership role with School Administrative Unit 29. She became assistant principal at Chesterfield Central School in 2002 before being named principal four years later, a position she held for the past 20 years. SAU 29 has not yet announced who will take over as principal of Chesterfield Central School.