John received BA and MA degrees from Yale University. He began his career as an English teacher at Groton School before returning to Yale, where he worked in the Admissions Office, served as a Residential Fellow of Timothy Dwight College, and completed his MA.
In 1975, he became Director of Admissions at Brooks School, North Andover, MA, serving in that capacity until 1981, during which time the school went from being all-boys to coeducational. In 1981, he became Assistant Headmaster of Pingree School South Hamilton, MA, and became Headmaster in 1982, a position he held until 1996, when he became General Director of the Koç School in Istanbul, Turkey. In 2005, he became Head of Robert College, also in Istanbul.
He has served as a Trustee of the Brookwood School (MA), and Pingree School, where he is now member of the Head’s Advisory Committee. He has served as a member of the University of Northern Iowa Advisory Board on Overseas Placement and the High Advisory Council of the Private Schools Association of Turkey. He is a member of the Country Day School Headmasters Association, and previously served on the Board of Advisors of Carney, Sandoe & Associates. He has led NEASC Accreditation Teams for several independent and international schools, as well as Candidacy Evaluation visits for the European Council of International Schools. He has been a facilitator for the NAIS Governance Through Partnership Program and has also consulted to several international schools on governance. He is a member of the Cruising Club of America and the Ocean Cruising Club.