Simon leslie

Head of School

Simon leslie

Simon is an incredibly experienced school leader and is known to many as the former Headmaster of NIST, here in Bangkok. Over a long and distinguished career, he has also lead ISHCMC in Vietnam, IST in Tanzania and worked for Geelong Grammar in his home country of Australia. 

Dr. Alfonso Orsini

Secondary School Principal

Dr. Alfonso Orsini

Alfonso began his career in 1977 teaching undergraduate students at Long Island University in Brooklyn, New York. After 12 years teaching English in independent schools in New York and New Jersey, he became Upper School Principal and IB Coordinator at Newark Academy in Livingston, New Jersey, one of the oldest, but most forward-looking prep schools in the United States. From there he became Head of School at Leysin American School in Switzerland, Director of Emirates National School in Abu Dhabi, Founding Head of the Western International School of Shanghai(full IB) , Head of School at The International School in Portland, Oregon (IB with full language immersion in Chinese, Japanese, and Spanish), and Head of School at Presidio Knolls School in San Francisco (inquiry based full Chinese immersion for American students). He holds a BA in English Literature from Hamilton College, an MA in English from Long Island University, and a Doctorate in Educational Administration from Teachers College, Columbia University in New York.

With Professor Pearl Kane, he co-authored The Colors of Excellence about faculty diversity in American independent schools, and has authored articles for Education Week, Independent School Magazine, and other publications.

Linda Byrne

Primary School Principal

Linda Byrne

Linda joined St. Andrews International School, Sukhumvit 107 in August 2008. She has a Bachelor's Degree in Education and a Diploma in teaching from Massey University in New Zealand. She started teaching as a primary school teacher in New Zealand for five years before travelling and working in Europe. In England, Linda taught a wide range of ages for 15 years. During this time, she also held positions of responsibility including literacy coordinator, art coordinator, and Head of Early Years and Key Stage One.