G. Peter O'Neill Jr., 14th Head of School
G. Peter O’Neill Jr. began his tenure as the 14th Head of School in July 2015 for the 2015-16 academic year. He recently acted as the Interim Head of School at the New Canaan Country School, in New Canaan, CT, where he was instrumental in leading a successful transition for the fifth Head of School Dr. Robert Macrae.
Prior to his time at New Canaan Country School, Peter built an impressive 40-year career as a leader in independent schools and education. For more than 20 years, he served as the Head of Garrison Forest School, a preschool-12 girls’ school in Owings Mills, MD. Although initially hired as the Interim Head of School, Peter led Garrison Forest to unprecedented growth. Under his leadership, the school completed a major campus transformation and expansion all funded by three highly successful capital campaigns. During this period, Peter spearheaded new innovative academic initiatives, including a collaboration with Johns Hopkins University through Garrison Forest’s WISE (Women In Science and Engineering) Program, as well as a professional development peer teaching program.
He previously served as Head of Wooster School in Danbury, CT, and has served as an Interim Head at Whitby School in Greenwich, CT, and Rutgers Preparatory School in Somerset, NJ. He has also held positions at The Marvelwood School in Cornwall, CT, and St. Peter’s School in Worcester, MA.
Additionally, Peter has made numerous contributions to the independent school professional community, including having served as President of the Association of Independent Maryland Schools, and on the boards of the National Coalition of Girls Schools and the Connecticut Association of Independent Schools. Peter also has worked with Living Classrooms Foundation and the Baltimore Educational Scholarship Trust. He has also served as an adjunct faculty member at the Johns Hopkins Graduate School of Professional Studies. The Klingenstein Center at Columbia University recognized him as one of the country's most outstanding school heads in 2006.
His wife Peggy is the executive director for the International Security Foundation, a non-profit organization that supports the work of the Overseas Security Advisory Council of the U. S. Department of State's Bureau of Diplomatic Security. She and Peter live in the Head of School’s House on campus.
Peter graduated from St. Michael's College in Vermont with a B.A. in American Studies and earned his master's degree, also in American Studies, from Trinity College in Connecticut.