UNION, Maine — A veteran educator will step into the top administrative post for Regional School Unit 40 on July 1.

Michael Cormier, who is retiring as superintendent of Farmington-based RSU 9, has agreed to serve as interim superintendent for RSU 40. The board voted without opposition at its May 16 meeting to hire Cormier on a per-day basis until a new more permanent candidate has been selected.

Pratt was hired in April by the Rangely Lakes Regional School District to be its superintendent and principal of its 50-student high school. Pratt has been RSU 40’s superintendent for two years.

RSU 40 Board Chairman Danny Jackson said that the board expects to begin advertising for a permanent superintendent in about a week. He said Cormier has agreed to stay on until the district finds a suitable candidate.

RSU 40 has about 1,800 students from Warren, Union, Washington and Friendship in Knox County and Waldoboro in Lincoln County.

The district is also experiencing other personnel changes at the administrative level.

Benjamin Vail is retiring as principal of Medomak Middle School, RSU 40 business manager Karla Miller said. He has been principal for the district’s middle school for 10 years. His retirement was announced at the school board’s Thursday night meeting.

And at that meeting, the board hired Christina Wotton to be principal for both the Union Elementary School and the Prescott Memorial School in Washington. Wotton is the assistant principal of the district’s Friendship Village School. She will succeed Richard Blackman, who is also retiring.