School leadership team

KELVIN KOH

Chairman of the SISB Schools Governing Board

Mr. Koh is the co-founder and chief executive officer of SISB Co. Ltd. Mr Koh was educated in Singapore and has been based in Thailand since 1992. He holds an executive MBA Degree from Sasin, Graduate Institute of Business Administration of Chulalongkorn University, Thailand and a diploma in mechanical engineering from Ngee Ann Polytechnic, Singapore. He speaks fluent English, Chinese and Thai.

NARISA LERTNAMWONGWAN

Executive Principal (Nursery-Kindergarten)

Working with children has always been Narisa’s passion from a young age. In addition to an Advanced Diploma in Mass Communication, she added a Second Bachelor of Arts Degree in Counseling Psychology with the Inter American University (Singapore) affiliated with the University of Buffalo. Narisa completed a Diploma in Montessori Early Childhood Teaching London Montessori Center and, in 2014, she completed a Graduate Diploma in Teaching and Learning in the Early Years by AECES, Singapore. With teaching and leadership experience in both Singapore and Thailand schools, Narisa combines pastoral and academic responsibilities to help the SISB campuses thrive and succeed.

DR. ONG TECK CHIN

Executive Principal (Primary & Sixth Form)

Dr. Ong achieved his doctorate of Philosophy in Biochemistry as a Rhodes Scholar from the University of Oxford, besides being conferred, a B. Sc. Hons Degree in Chemistry, M. Ed., Diploma in Education Admin. with Distinction and a Diploma in PCCG. With about 50 years of experience in education or its management, traversing Nursery/Kindergarten, Primary, Secondary, High School and University teaching, his passion is in teaching, setting up schools and implementing the IBDP in premier and international schools in his home country Singapore and overseas.

Dr. Ong Teck Chin

Head of School

Dr. Ong achieved his doctorate of Philosophy in Biochemistry as a Rhodes Scholar from the University of Oxford, besides being conferred, a B. Sc. Hons Degree in Chemistry, M. Ed., Diploma in Education Admin. with Distinction and a Diploma in PCCG. With about 50 years of experience in education or its management, traversing Nursery/Kindergarten, Primary, Secondary, High School and University teaching, his passion is in teaching, setting up schools and implementing the IBDP in premier and international schools in his home country Singapore and overseas.

Marion Barbe

Principal Designate
Nursery-Kindergarten

Marion is a passionate Early Years educator. She has been working in education and internationally for the past 12 years and joined SISB 11 years ago. After a Bachelor degree in English Literature from the University of Bordeaux, France, Marion got her Education credentials from the University of Manitoba, Canada. She is committed to developing the “whole child” and promotes teaching practices where the child is an active participant of the learning process and an empowered individual. She believes in guiding new students and their families through the first years of school to make sure they have the best experience and foundation that will lead to great academic success and well-being in the following years. As a long-standing member of SISB, she has helped develop a community of leaders, scholars and global citizens.

Hero Lee

Principal
Primary

Hero possesses a Postgraduate Diploma in Education from National Institute of Education, Singapore, and has been in the education industry for 16 years. He joined SISB in 2012 and rose through the ranks to become Primary School Principal. Hero is passionate about Mathematics, Music, and Child Safeguarding and believes that every child is unique. He enjoys interacting with students, teachers, and parents, and being able to witness the growth and development of each child to become a Scholar, Leader and Global Citizen gives him an immense sense of satisfaction.

Jason Tee

Principal
Sixth Form School

Jason graduated from National University of Singapore with a Bachelor of Arts in Geography in 2005. Following that, he graduated from the Nanyang Technological University with a Postgraduate Diploma Certificate in Education. In 2022, he received a Masters Degree in Educational Leadership from Manchester University. He has accumulated 15 years of experience in the education field including several leadership positions in schools in Singapore, China, and Thailand. He has a passion for sports and enjoys travelling during his free time.

Irene Ng

Acting Head of School
Acting Principal

Irene attained her Bachelor of Science (Education) Honours degree from Nanyang Technological University and Diploma in Education with Credit from National Institute of Education. Since 2002, Irene has taught many subjects with strong passion in Science and English. She has shown great interest in curriculum and assessment as well. She took on leadership responsibilities such as Subject Head for English and Science and Head of Department for Science. Irene is proactively working with her colleagues to provide a student-centric holistic education to bring out the uniqueness in every child.

Ratchanee Abigail Arnanta

Assistant Principal
Nursery-Kindergarten

Abigail has been teaching young children for almost half of her life. A 2004 graduate of Manila Doctor’s College in the Philippines. Abigail is half Thai, half Filipino, and was born and raised in the Philippines. She decided to permanently move to Thailand after earning her college degree. Currently, she is completing her Master in Education Curriculum and Instruction at the Assumption University of Thailand. Abigail specialises in helping her team with classroom management, instructional strategies, and project-based learning and inquiry-based approaches. Abigail is a lifelong learner and a resilient leader.

Timothy Dickens

Assistant Principal

After receiving an undergraduate degree from Colorado State University in Speech Communications with a focus in Communication Theory, Timothy then went on and completed a Postgraduate Certificate in Education (PCCG) from Nottingham University. He joined SISB in 2012 where he worked for 6 years, before returning to SISB in 2020, with teaching stints in South Korea and China as well. Timothy has been working on developing pastoral care and school-wide Corporate Social Responsibility at SISB Suvarnabhumi. In his free time, Timothy enjoys spending time with his family, traveling, socialising, and making a difference in the world around him.

Narisa Lertnamwongwan

Head of School
Principal, Nursery-Kindergarten

Working with children has always been Narisa’s passion from a young age. In addition to an Advanced Diploma in Mass Communication, she added a Second Bachelor of Arts Degree in Counseling Psychology with the Inter American University (Singapore) affiliated with the University of Buffalo. Narisa completed a Diploma in Montessori Early Childhood Teaching London Montessori Center and, in 2014, she completed a Graduate Diploma in Teaching and Learning in the Early Years by AECES, Singapore. With teaching and leadership experience in both Singapore and Thailand schools, Narisa combines pastoral and academic responsibilities to help the SISB campuses thrive and succeed.

Edwin Wong

Principal
Primary & Sixth Form School

Edwin joined SISB in January 2021. Before that, he was a school leader in two primary schools in Singapore and has over 23 years of teaching experience in a Junior College, an Independent School, and a Secondary School. Edwin strives to build a professional learning culture that supports learning for both students and staff. He firmly believes that all teachers are designers of learning experiences and facilitators of learning where students actively learn using technology. Edwin believes every child can learn – not just in school, but for the rest of his life. Children have different strengths and dissolution, and should be nurtured to become engaged learners who are motivated, enjoy learning and go on to fulfill their potential.

Thomas Fisher

Acting Head of School
Deputy Principal

Thomas is currently Acting Head of School in Chiangmai campus and has 15 years of experience at all levels of education. He currently holds a Postgraduate Degree in Education and is passionate about teaching and learning. Thomas has a particular interest in pedagogy and how to blend teaching methodology to produce the best learning experience for students. Building a better future globally is a key component of Thomas’s beliefs in educating young people. At SISB he believes that our lifelong learners really can change the world if they are given the right foundation to do so!

Daniel Maxwell

Assistant Principal
Primary

Daniel grew up in England where he earned a Bachelor’s degree in English Literature at the University of London and a Master’s degree in Education Leadership from the University of Bath. He has been teaching for over 20 years. Daniel is the Assistant Principal at SISB Chiangmai Campus and a school evaluator for the Council of International Schools (CIS). He is also an education writer whose articles have been published in the Bangkok Post, The Nation and South China Morning Post.

Greg Stoltz

Assistant Principal
Sixth Form School

After obtaining a BA in English and a PGCE in Language and Literature from the University of South Africa, Greg ventured abroad with stints in London, Cambodia, and South Korea. His International School tenure began at Tsinghua International School, where he taught Grade 7 English. Venturing to Thailand, he spent a year at SISB Pracha Uthit before moving in 2020 to SISB Chiangmai, where he now serves as Assistant Principal of Sixth Form. His passion for people has led to his educational philosophy of developing holistic learners and future teacher leaders. Greg is humbled and proud to help shape future generations at SISB Chiangmai.

Dr. Ong Teck Chin

Head of School

Dr. Ong achieved his doctorate of Philosophy in Biochemistry as a Rhodes Scholar from the University of Oxford, besides being conferred, a B. Sc. Hons Degree in Chemistry, M. Ed., Diploma in Education Admin. with Distinction and a Diploma in PCCG. With about 50 years of experience in education or its management, traversing Nursery/Kindergarten, Primary, Secondary, High School and University teaching, his passion is in teaching, setting up schools and implementing the IBDP in premier and international schools in his home country Singapore and overseas.

Larry Goh

Principal
Primary

Larry graduated with an Honours in Education (Primary) from Nanyang Technological University of Singapore. Having been in the education sector for 14 years and counting, he has developed a passion for holistic education and he always strives to bring out the best in the students under his care. Being a firm believer in quality education, Larry emphasises on the best learning environment and meaningful and authentic curriculum for the students. Quoting from him, “These children are our future, and for they pass through our hands, we are responsible for moulding them to be what they desire to be and for guiding them towards realising their fullest potential”.

Lee Webster

Principal Designate
Sixth Form School

Lee has been teaching in international schools for over 25 years and has experience in Primary and Secondary education. Lee has been Dean of IT for over 10 years and has been Deputy Principal at SISB for the past 3 years. He has been involved in planning curriculums and assessments in a range of subjects and is certified to teach Cambridge and the IB Diploma Programme. Lee is a Google Certified Teacher, Trainer and Innovator and has presented a variety of workshops to fellow educators on technology integration in different schools across the APAC region. Lee enjoys helping educators to progress on their technology journey. 

Dr. Ong Teck Chin

Head of School

Dr. Ong achieved his doctorate of Philosophy in Biochemistry as a Rhodes Scholar from the University of Oxford, besides being conferred, a B. Sc. Hons Degree in Chemistry, M. Ed., Diploma in Education Admin. with Distinction and a Diploma in PCCG. With about 50 years of experience in education or its management, traversing Nursery/Kindergarten, Primary, Secondary, High School and University teaching, his passion is in teaching, setting up schools and implementing the IBDP in premier and international schools in his home country Singapore and overseas.

Kelly Walker
Coordinator
Larry graduated with an Honours in Education (Primary) from Nanyang Technological University of Singapore. Having been in the education sector for 14 years and counting, he has developed a passion for holistic education and he always strives to bring out the best in the students under his care. Being a firm believer in quality education, Larry emphasises on the best learning environment and meaningful and authentic curriculum for the students. Quoting from him, “These children are our future, and for they pass through our hands, we are responsible for moulding them to be what they desire to be and for guiding them towards realising their fullest potential”.
Esther Nip

Principal Designate
Primary

Esther graduated from Nanyang Technological University with a bachelor’s in Biological Sciences and completed the Postgraduate Diploma in Education (PGDE) at the National Institute of Education, Singapore. She started her teaching career at Nan Chiau Primary School in Singapore before heading to Kuala Lumpur where she was the Head of Mathematics and Science at Mutiara International Grammar School. She was promoted to Head of Curriculum where she introduced problem-solving and design thinking processes to the Primary UK curriculum. She joined SISB in 2019 as a Mathematics teacher.