Ms. Sarah Gallagher, BA (Hons) HDipEd, MA (Hons) (University College Galway, Ireland) was appointed Executive Head of School for Marymount International School Rome in August 2016 and Headmistress of Marymount International School London in August 2010.

Ms. Gallagher received her Bachelor's Degree, a Higher Diploma in Education and a Master's Degree in Ancient Classics at the National University of Ireland, Galway and pursued doctoral studies in the United States. An experienced administrator, Ms. Gallagher is also a teacher of Latin, Greek, Classical Civilisation and Ancient History. She has taught in schools in London and in Rome and in higher education in the United States. She is married and has two daughters.