Home > About Us > Our Team

Our Team

Executive Leadership


Our leadership team hails from Singapore’s world-class education system, having held various senior positions at leading Singapore educational institutions as well as the Ministry of Education.

Executive Director
Executive Director
Mr Tan Tee How joined CES as the Executive Director of CES in February 2018. Prior to this, he
was the Commissioner of Inland Revenue and Chief Executive Officer of Inland Revenue Authority of Singapore. Mr Tan served as Permanent Secretary (National Development) in 2004 and was appointed as Permanent Secretary (Home Affairs) in 2011. He was also a board member of the National University Health System from April 2016 to March 2019.
Chief Operating Officer
Chief Operating Officer
Mr Law Cheong Yan joined CES as Chief Financial Officer in August 2013 and progressed to a new role as the Chief Operating Officer in Jan 2022. Prior to this, Mr Law spent more than nine years in China and the U.S. managing the businesses of several Singapore companies’ overseas subsidiaries. Mr Law was also the Group’s Financial Controller for the period from June 1999 to February 2004 and an auditor with an international accounting firm from September 1995 to June 1999. He is also a member of ISCA and CPA Australia. He serves as an independent director of Dynamic Colours Limited.
Executive Vice President & Director of Education
Executive Vice President & Director of Education
Dr Koh Thiam Seng joined Sing-Ed Global Schoolhouse as Senior Vice President in October 2018. Prior to this, Dr Koh was Associate Dean at the Office of Education Research and Associate Professor of Natural Sciences and Science Education at the National Institute of Education where he had served for more than 28 years. At the Ministry of Education, he was a Deputy Director (2000–2003) in the Higher Education Division before moving on to Director of Educational Technology (2003 – 2008). He was concurrently Deputy Director (2007–2008) at NIE. He was Principal (2009–2015) of St. Joseph’s Institution and Chief Executive Officer (2015–2017) at St. Joseph’s Institution International School.
Senior Vice President & Chief Technology Officer
Senior Vice President & Chief Technology Officer
Mr Hee Joh Liang joined Sing-Ed as the Chief Technology Officer and Senior Vice-President in April 2021. He has over 30 years of local and overseas experience under his belt, with an extensive track record of operational excellence and performance in both the education and technology industries. This includes being the Deputy Principal (Development) of Singapore Polytechnic for 11 years, where he led polytechnic-wide innovations such as introducing Design Thinking into all Diploma programmes and ensuring that the polytechnic prepared its graduates with the relevant knowledge and skills for work in the industry. He co-chaired the Polytechnic-ITE Committee on AI in technical education. He brings to the job his deep expertise in the use of technologies for learning and an extensive network in the industry. He was also the Regional Director of Cengage Publishing overseeing Japan and Korea, the Senior Director at the National Computer Board and was the IT-Planner of the Ministry of Education’s 1st IT in Education Master Plan. He has worked in the US for seven years. Mr Hee holds a Bachelor’s degree with Honours in Computer Science and Combinatorics & Optimization from the University of Waterloo and a Master’s degree in Computer Science from the University of Florida.
Group Marketing Director
Group Marketing Director
Mr Brian Frissyn started as a consultant with Sing-Ed in June 2020 and was appointed Group Marketing Director in March 2021. Brian has spent more than 20 years in various strategic Marketing roles at companies such as General Electric, MasterCard and Abn Amro, both in Europe and Asia. Most recently Brian was the APAC Chief Marketing Officer at PageGroup, formerly known as Michael Page International. Brian also holds a Master in Economics from the University of Antwerp and MBA from Melbourne Business School. A Singapore PR, Brian has been living in Singapore for more than 10 years and is married to a Singaporean with 2 daughters.


Academic Leadership


Our Singapore teachers are highly qualified and trained educators who have extensive experience teaching the Cambridge syllabus. Beyond academic qualifications, Singapore teachers are also competent in social emotional competencies to motivate young people.

Educational Programme Management
Educational Programme Management
Dr Koh Thiam Seng joined Sing-Ed Global Schoolhouse as Senior Vice President in October 2018. Prior to this, Dr Koh was Associate Dean at the Office of Education Research and Associate Professor of Natural Sciences and Science Education at the National Institute of Education where he had served for more than 28 years. At the Ministry of Education, he was a Deputy Director (2000–2003) in the Higher Education Division before moving on to Director of Educational Technology (2003 – 2008). He was concurrently Deputy Director (2007–2008) at NIE. He was Principal (2009–2015) of St. Joseph’s Institution and Chief Executive Officer (2015–2017) at St. Joseph’s Institution International School.
Educational Technologies Management
Educational Technologies Management
Mr Hee Joh Liang joined Sing-Ed as the Chief Technology Officer and Senior Vice-President in April 2021. He has over 30 years of local and overseas experience under his belt, with an extensive track record of operational excellence and performance in both the education and technology industries. This includes being the Deputy Principal (Development) of Singapore Polytechnic for 11 years, where he led polytechnic-wide innovations such as introducing Design Thinking into all Diploma programmes and ensuring that the polytechnic prepared its graduates with the relevant knowledge and skills for work in the industry. He co-chaired the Polytechnic-ITE Committee on AI in technical education. He brings to the job his deep expertise in the use of technologies for learning and an extensive network in the industry. He was also the Regional Director of Cengage Publishing overseeing Japan and Korea, the Senior Director at the National Computer Board and was the IT-Planner of the Ministry of Education’s 1st IT in Education Master Plan. He has worked in the US for seven years. Mr Hee holds a Bachelor’s degree with Honours in Computer Science and Combinatorics & Optimization from the University of Waterloo and a Master’s degree in Computer Science from the University of Florida.
Physics and Instructional Technologies
Physics and Instructional Technologies
Mr Yeow Kok Han joined Sing-Ed Global Schoolhouse as Vice President in July 2021. He started as a physics teacher in Tampines Junior College in 1996. In 2004, he completed his part-time Master of Science Physics. He was Level Head Physics from 2008 until he left MOE in 2012. After that, he was working on his personal project on developing an adaptive learning system and the accompanying content. From 2018 to 2020, he was at SIM International Academy as a physics teacher for the Cambridge International A Level and IGCSE. He was also involved in the school’s STEM programme and student data management. After that he did a short course on Data Analytics and co-authored a secondary Physics textbook.
Mathematics and Instructional Design
Mathematics and Instructional Design
Mr Lim Bock Boon joined Sing-Ed Global Schoolhouse as Vice President in January 2022. He has taught Mathematics at the Junior College and Secondary levels for more than 20 years, beginning his career as a Mathematics teacher in Tampines Junior College. He was appointed as Head of Department from 2005 until 2020. To stoke interest in Mathematics and extend learning beyond the classrooms, he introduced Mathematical Modelling where students learn how Mathematics can be used to model everyday activities.
Amongst his teaching achievements, Bock Boon was presented PS21 Outstanding Activist Award (2011) for his outstanding contribution in promoting innovation in the organization, NIE Caring Teacher award (2012, 2014) and Excellence Service Award (Star).
As a passionate educator, he has strong interest in research in Mathematics teaching and has presented his papers in several local and overseas conferences.
English Language  and Instructional Design
English Language and Instructional Design
Ms Elizabeth Mesenas joined Sing-Ed Global Schoolhouse as Senior Specialist, English Language in January 2022. Prior to this, she was Subject Head (General Paper) at Millennia Institute, and served more than 10 years in Singapore’s public education sector. During her service, she received several awards, including the inaugural Inspiring Teacher of English award in 2008. She lived as an expat in Beijing for several years, and continued to fuel her passion for education through organising English Language programmes for underprivileged children. Even now, she continues to develop her passion through using innovative technology solutions such as live video classrooms to teach English to international students, working adults and seniors.
She is married with two teenage children.
Science and Instructional Design
Science and Instructional Design
Ms Melissa Yam joined Sing-Ed Global Schoolhouse as Assistant Vice President in December 2020. Prior to this, she was a Learning Specialist at Certis Corporate University where she spearheaded the effort of using insights drawn from learning data to continuously improve end-to-end processes of corporate training. Before that, she was a Senior Learning Designer at the National Institute of Education. She was a consultant mainly to Science lecturers, in the design and implementation of pedagogically sound technology mediated learning environments for teaching and learning Science. She also had 14 years of experience teaching Mathematics and Physics at the secondary school level, and was a Curriculum Specialist for the Science International Baccalaureate Programme at St. Joseph’s Institution.
Biology
Biology
Upon completing her Postgraduate studies in Secondary Education at the National Institute of Education in Singapore, Leonie began her career in teaching with a prestigious independent secondary school in Singapore. There she had the opportunity to not only teach Biology and General Science but to also develop a unique interdisciplinary programme and curriculum which focused on real world issues and problems. Shifting her career to the private sector, Leonie became a pioneer in developing curriculum for a tuition centre which made use of technology to personalise learning for their students. Leonie continues to keep up to date with new pedagogical techniques to suit the learners of the 21st century.
Chemistry
Chemistry
After attending National University of Singapore and National Institute of Education, Gamar began her career as a High School teacher. Her love for Science led her to teach Chemistry, where she enjoyed sharing her knowledge with her students, preparing them for their GCE A Levels. Gamar also taught Project Work for several years, helping students acquire skills like collaboration, communication, and independent learning. She believes that teaching is a two-way journey, as she enjoys learning from her students’ varied experiences as well. Her novel approach to teaching was recognised when she won the Most Innovative Teaching Award. Gamar’s love for teaching did not stop at her students, as she volunteered her time and expertise to teach at a resource-scarce secondary school for 2 years.
Physics
Physics
Winston is a former secondary school teacher with 10 years of experience teaching Physics at both state-run and independent schools. Having benefitted from lecturers and teachers who were clear in their teaching, Winston places great emphasis on teaching the subject matter with clarity. He endeavours to share his knowledge in a systematic way so that his learners can cultivate the discipline to ruminate on problems, develop the confidence to test their ideas in unfamiliar situations and show an appreciation for logical thinking. Winston strongly believes that every learner matters. He always puts his best in ensuring every learner is given the attention and feedback they need to succeed in learning.


Advisory Board


Undefined
Prof. Low Teck Seng is the Chief Executive Officer of the National Research Foundation. He was previously the Managing Director of A*STAR (2010 – 2012). Prior to this, Professor Low assumed the roles of founding principal of Republic Polytechnic (2002 – 2008) and Dean of the Faculty of Engineering at the National University of Singapore (1998 – 2000). He also led A*STAR’s Data Storage Institute (1992 – 1998) as Executive Director.
Prof. Low was awarded the National Science and Technology Medal in 2004 – for his contributions to the domain of R&D, propelling Singapore’s growth and development. In 2007, he was also awarded the Public Administration Medal (Gold) for his meritorious service to Singapore.
Prof. Low is a Fellow of the Institute of Electrical and Electronics Engineering (IEEE), an International Fellow of the Royal Academy of Engineering, UK and Fellow of the Singapore Academy of Engineers.
Undefined
Prof. Leo Tan Wee Hin has a Ph.D. degree in Marine Biology and he is concurrently President of the Singapore National Academy of Science as well as Professor of Biological Sciences and Director of Special Projects in the Faculty of Science at the National University of Singapore.
Prior to this, Prof. Leo was Director of the National Institute of Education and Director of the Singapore Science Centre. His research interests pertain to the fields of marine biology, ICT in education, Science education, Museum Science, Telecommunications, and Transportation.
Prof Leo has numerous publications in international refereed journals.
Undefined
Prof. Bernard C Y Tan is Senior Vice Provost (Undergraduate Education) at the National University of Singapore (NUS). He assists the Provost in setting educational directions and policies, and in assuring educational quality for the University. He has oversight of Registrar's Office, Office of Admissions, Centre for Development of Teaching and Learning, Centre for Instructional Technology, Centre for Future-Ready Graduates, Centre for the Arts, Institute for Application of Learning Science and Educational Technology, NUS Libraries, and NUS Teaching Academy.

Prof Tan was Vice Provost (Undergraduate Education and Student Life) from 2012 to 2017, Associate Provost (Undergraduate Education) from 2009 to 2012, Executive Council Chair of NUS Teaching Academy in 2009, Head of Department of Information Systems from 2002 to 2008, and Assistant Dean in School of Computing from 2000 to 2002. His achievements include the Public Administration Medal (Silver) in 2012, NUS Outstanding Educator Award in 2004, and NUS Young Researcher Award in 2002.

Prof Tan was President (from 2009 to 2010) and Asia-Pacific Council Representative (from 2004 to 2006) of the Association for Information Systems (AIS). He is a Fellow of the AIS. He has served on the editorial boards of MIS Quarterly (Senior Editor), Journal of the AIS (Senior Editor), IEEE Transactions on Engineering Management (Department Editor), Management Science (Associate Editor), ACM Transactions on Management Information Systems (Associate Editor), and Journal of Management Information Systems (Editorial Board Member).

Prof Tan is Shaw Professor in the Department of Information Systems and Analytics. His research interests include social media, virtual communities, and Internet commerce. He has given invited talks and keynote addresses at various international conferences. His research work has been published in major international journals and conference proceedings in the field of information systems.
Undefined
Prof. David Hung is Dean of Education Research and Centre Director of Science of Learning in Education at the National Institute of Education (NIE), Nanyang Technological University (NTU), Singapore. His research interests are in learning and instructional technologies, constructivism and social constructivism, cognition and communities of practice. In particular, he is interested in the social cultural orientations in the contextual systems of schools in Singapore and he works on scaling of innovations in schools as one of his key research foci. Professor Hung has also delved into the Science of Learning in Education. His foundations in learning and the learning sciences has prepared him for his foray into the neuroscience, physiological, and other biological indicators of learning. Professor Hung juxtaposes the science of educational systems with the science of learning. More recently, he was appointed as the NTU’s President’s Chair in Learning Sciences.

Most of Professor Hung’s keynotes are on the interplay between the intersection of policy, learning sciences and the science of learning. His publications are internationally known, and he is an authority in the fraternity of learning sciences and educational technology communities in both the local and international scenes.
Undefined
Associate Professor Wu Siew Mei is Vice Dean of Students at the Office of Student Affairs (OSA), National University of Singapore. Prior to this, she was the Director of the Centre for English Language Communication (CELC), playing a key role in elevating English communication skills of both local and international undergraduate and graduate students at the National University of Singapore.

Associate Professor Wu has also served as Chief Editor for the Centre’s International Symposium Proceedings and has done invited reviews for various international journals, including the Journal for Second Language Writing. She currently sits on the Editorial Board for the on-line Asian Journal of the Scholarship of Teaching and Learning (AJSoTL).

As a council member of the English Language Institute of Singapore’s (2012-2018), she provided advisory guidance to the design and development of the English Language syllabus for Singapore schools. Recently, she completed her advisory role to English assessment matters through the Singapore Examinations and Assessment Bureau (2018-2020) initiative on reviewing the General Paper assessment format.
Undefined
Mr Tan Yap Kwang graduated from Queen’s University at Kingston, Canada with a B Sc Hons degree in Physics and a B Ed degree.
After joining the Singapore Education Service, he attended the University of London Institute of Education and obtained a Master’s degree in Educational Psychology and Education Statistics.
In the Ministry of Education, Mr Tan served in several Divisions and was the Director for various Divisions including Planning, Educational Technology and Examinations. As Director of Educational Technology, he spearheaded the Ministry’s first IT Masterplan.
In 2004, he helped establish the Singapore Examinations and Assessment Board (SEAB) and was appointed as its first Chief Executive. During his tenure in SEAB, he implemented various reforms in Singapore’s National Examinations, including greater control of the GCE O-level and A-level examinations, in partnership with Cambridge Assessment.