The principal of Samuel L. Wagner Middle School in Winterport will become the superintendent of Regional School Unit 22 in Hampden on July 1. Nicholas Raymond will replace Regan Nickels as RSU 22 superintendent after the school board unanimously approved his hiring on Wednesday night, district spokesperson Nikki Knupp said. Nickels announced in March that she would step down as superintendent at the end of the school year to become superintendent of Sequim schools in Washington.