School leadership team

Group 48096057
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.

Group 48096059
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.

Group 48096060
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.

Mask group 2
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.

Rectangle 39611
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.

Rectangle 39611 1 1
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.

Rectangle 39612
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.

Mask group 3
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.

Rectangle 39611 3
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.

Mask group 4
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.

Rectangle 39611 4
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.

CM principal 200x200
Daniel Maxwell

Acting Head of School
Deputy Principal
Nursery-Kindergarten, Primary & Sixth Form

Daniel Maxwell 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.
Daniel is the Acting Head of School at SISB Chiangmai and a school evaluator for the Council of International Schools (CIS). He has been teaching for over 25 years.

Group 48095988
Kelvin Koh

Head of School

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

Group 48096967
Jack Beyleveld

Deputy Principal
Nursery-Kindergarten

Jack Beyleveld is an inspired educator driven by a love for teaching. He has worked in early childhood education for the past decade and joined SISB in 2018. Jack earned a Bachelor’s Degree in digital film production and later a postgraduate degree in education. Through innovative approaches, technology integration, and advocacy, Jack strives to develop students holistically and to instil a love for learning while fostering compassionate global citizens.

Chris 200x200
Chris Bacon

Principal
Primary

Chris grew up in the south of England before spending most of his life teaching abroad. He has been involved in education for more than 20 years and has been involved in leadership roles at SISB since 2018. With a love of technology and innovative teaching, Chris has spearheaded improvements to English Language and ICT teaching across all SISB campuses. Chris firmly believes in each and every student’s ability to achieve success and strives to develop students holistically so that they can find their passion in life. Outside of school, Chris is a committed lifelong learner and has interests in music and technology.

Rectangle 39611 8
Lee Webster

Principal
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 held several leadership roles. 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. 

Mask group 2
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.

Stephanie 200x200
Stephanie Chai

Principal
Nursery-Kindergarten

Stephanie graduated with a Bachelor of Science in Early Childhood Education from Wheelock College, Boston University. She believes in the philosophy “Educating the mind without educating the heart is no education at all”, said by Aristotle. It is her passion to ensure that all students not only receive a well-rounded education but also learn the importance of kindness, compassion, and empathy. It is with this belief that she is committed to creating a safe and inclusive environment that nurtures each student’s intellectual, emotional, and social growth. With over 17 years of experience in education, she has witnessed firsthand the impact that a caring and supportive community can have on a child’s academic success. As a result, she is dedicated to fostering a culture where every student feels valued and respected, and where they are encouraged to explore their passions and reach their full potential.

Larry Photo 1 2
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”.

Rectangle 39611 6
Greg Stoltz

Deputy 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 until 2023. 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.