Dr. John Sieller retired in 2017 after sixteen years as principal of Region 15’s Memorial Middle School. His administrative experiences also include principal of Gildersleeve School in Portland from 1991-2001 and assistant principal of Portland Middle School from 1988-1991. Prior to his twenty-nine years in administration, he taught science at John F. Kennedy Jr. High in Southington and Pomperaug High School in Region 15.

Throughout his administrative career, John has chaired or co-chaired many district-wide professional development, teacher evaluation, and building/climate enhancement committees. He is a life-long learner, earning his bachelor’s and master’s degrees at Rutgers University, sixth year in educational administration at Southern Connecticut State University in 1990 and doctorate in educational leadership in 2011. The title of his dissertation at UConn was “Teachers’ Professional Learning: Role of the Building Leader.”

More recently, John has collaborated to develop and lead several CAS programs and events, including the New Leaders Academy and the CAS Professional Studies Committee. He also served as a beginning administrator mentor.

John has joined the central office staff as interim director of CAS’ middle level division following the recent retirement of Donna Schilke.