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Invictus Global Schoolhouse (IGS)

Invictus Global Schoolhouse (IGS) stands at the forefront of innovation in education, pioneering blended learning experiences for tomorrow’s global citizens. With a footprint spanning Singapore, Cambodia, Hong Kong SAR, Malaysia, and the People’s Republic of China, we are part of the esteemed Sing-Ed Global network of schools, committed to fostering a dynamic and inclusive learning community.

Blended Learning

Our Learning Approach


We champion a blended learning approach, combining the benefits of online and onsite learning to offer a unique educational experience. Our model incorporates 70% online learning and 30% onsite learning, providing a flexible, engaging, and interactive learning environment. This blend not only promotes academic success but also develops essential skills such as self-discipline, time management, and digital literacy.

Our Team

Comprised of esteemed individuals from Singapore’s prestigious educational landscape, our leadership team has held senior roles in leading institutions and the Ministry of Education, bringing invaluable expertise to our organization. Alongside them, our Singaporean teachers are not just highly qualified and experienced in teaching the Cambridge syllabus, but they are also adept at instilling social-emotional competencies to motivate the younger generation. Together, our team exemplifies the high standards of Singapore’s celebrated education system, bringing world-class education to our online platform.

Mr Tan Tee How has been with CES since 2018 as the Executive Director. His illustrious career includes roles such as Commissioner of Inland Revenue and CEO of the Inland Revenue Authority of Singapore. He also served as Permanent Secretary (National Development) in 2004 and Permanent Secretary (Home Affairs) in 2011. Between 2016 to 2019, he was a board member of the National University Health System.


Mr Tan Tee How

Executive Director

Mr Law Cheong Yan joined CES in 2013 as the Chief Financial Officer and later became the Chief Operating Officer in 2022. He has vast international experience in managing Singapore companies' overseas businesses in China and the U.S., having spent over nine years there. His previous roles include being the Group's Financial Controller (1999-2004) and an international accounting firm's auditor (1995-1999). A member of ISCA and CPA Australia, he serves as Dynamic Colours Limited's independent director.


Mr Law Cheong Yan

Chief Financial Officer

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.


Dr Koh Thiam Seng

Executive Vice President & Director of Education

Mr Hee Joh Liang assumed the position of Chief Technology Officer and Senior Vice President at Sing-Ed in April 2021, bringing over 30 years of experience in education and technology. Previously, he held positions such as Deputy Principal (Development) at Singapore Polytechnic for 11 years, Regional Director of Cengage Publishing, Senior Director at the National Computer Board, and IT-Planner at the Ministry of Education. Having spent seven years in the US, he has extensive international experience. Mr Hee holds a Bachelor's and a Master's degree in Computer Science.


Mr Hee Joh Liang

Senior Vice President & Chief Technology Officer

Mr Lee Leck Seng has been working in Singapore Polytechnic for more than 25 years before he joined Sing-Ed Global Schoolhouse. His experience lies in education and industry engagement, ranging from being a Lecturer of Mechanical Engineering, a Deputy Director of the School of Mechanical and Manufacturing, the General Manager and finally the Director (Industry) of Industry Engagement and Partnership. He is also well-versed in Leadership, Regional Business Development, Machine Designing and Building, Contract Manufacturing of Components and Quality Auditing.


Mr Lee Leck Seng

Senior Vice President
(Business Development)

BSc (NUS), DipEd (NUS), MSc(Hons) (Massey University), PhD (Monash University)

Dr Koh Thiam Seng joined Sing-Ed Global Schoolhouse in 2018, leveraging his experience as an Associate Dean and Associate Professor at the National Institute of Education. His previous roles include being a Deputy Director and Director at the Ministry of Education and Principal of St. Joseph’s Institution.


Dr Koh Thiam Seng

Educational Programme Management

BMaths (Hons) (University of Waterloo), MSc (University of Florida)

Mr Hee Joh Liang is Sing-Ed's CTO and Senior Vice-President since 2021. He boasts an extensive career in education and technology, including a tenure as Deputy Principal of Singapore Polytechnic and various roles at the Ministry of Education and the National Computer Board.


Mr Hee Joh Liang

Educational Technologies Management

Ms Elizabeth Mesenas joined Sing-Ed Global Schoolhouse as Senior Specialist, English Language in 2022. Her decade-long career in Singapore’s public education sector and her international experience in Beijing have shaped her passion for innovative education.


Ms Elizabeth Claire Mesenas

English Language and Instructional Design

BEng (Hons) (NTU), DipEd (NTU, NIE), MEd (University of Melbourne)

Ms Melissa Yam, Assistant Vice President at Sing-Ed Global Schoolhouse since 2020, brings her expertise from roles at Certis Corporate University and the National Institute of Education. Her teaching experience spans Mathematics and Physics at secondary school level.


Ms Melissa Yam

Science and Instructional Design

BSc (NUS), DipEd (NTU, NIE)

Ms Leonie Tan's career began in teaching at a prestigious secondary school in Singapore and later shifted to the private sector developing unique curriculum programs. Her continuous pursuit of updated pedagogical techniques marks her contribution to modern education.


Ms Leonie Tan



Ms Maureen Ng is a seasoned mathematics educator, who has headed various departments in Singaporean schools. With a strong interest in modern educational methods, she has created innovative online learning resources for mathematics at the Ministry of Education.


Ms Maureen Ng


Prof. Low Teck Seng, CEO of the National Research Foundation, has a distinguished career in academia and research, including positions as A*STAR's Managing Director and Republic Polytechnic's founding principal. He is recognized for his substantial contributions to R&D.


Professor Low Teck Seng

Prof. Leo Tan Wee Hin, President of the Singapore National Academy of Science, is also a Professor of Biological Sciences at the National University of Singapore. His extensive research spans marine biology, ICT in education, and Science education.


Professor Leo Tan Wee Hin

Prof. Bernard C Y Tan is the Senior Vice Provost at the National University of Singapore (NUS). His responsibilities include overseeing multiple educational departments and upholding educational quality. His diverse roles at NUS and contributions earned him multiple awards.


Professor Bernard Tan

Prof. David Hung is the Dean of Education Research at the National Institute of Education, focusing on learning technologies, cognition, and communities of practice. His research has made substantial contributions to the learning sciences and educational technology.


Professor David Hung

Associate Professor Wu Siew Mei, Vice Dean of Students at the National University of Singapore, has contributed significantly to the field of English language communication. She has provided valuable advisory guidance to English language education initiatives in Singapore.


Associate Professor Wu Siew Mei

Mr Tan Yap Kwang, an experienced educator, has served in several key positions within the Ministry of Education, including being the Director for multiple divisions. As the first Chief Executive of the Singapore Examinations and Assessment Board, he implemented various significant reforms.


Mr Tan Yap Kwang