School Management

Christiane Kuebler

Interim Principal of GESS

Education:

Christiane Kübler studied biology and chemistry at the Technical University of Darmstadt. She initially worked as a chemist in research and marketing.

Work experience and professional focus:

After a teaching position in Frankfurt, she taught at the Deutsche Höhere Privatschule, a German school abroad, in Windhoek, Namibia, from 1994 to 2002, both in the German and English-language IGCSE school streams, before taking over as head of the bilingual school branch at a large secondary school in Darmstadt. She has been head of highschool at GESS since 2014 and, in this role, has been a member of the GESS senior management team as director since 2023.

Her hobbies include sports and travel, as well as spending time with her family.

With her extensive experience in education, leadership and international expertise, Ms Kübler will serve as interim principal of GESS for the 2025-26 school year. She is committed to open, trusting and appreciative communication with the entire school community in order to further successfully expand the strategic goals of GESS and create an environment in which our students feel comfortable and can develop personally and academically.

Joram Hutchins

Vice Principal of GESS

Education:

  • Master of Education (MEd), University of Tasmania
  • Global education and leadership


Work experience and professional focus:

With almost twenty years of experience working as an educator in Singapore, Joram has been a member of the GESS faculty since 2009 and has held various positions before becoming the Academic Director in February 2022. He has overseen the school's successful reaccreditation with the International Baccalaureate Organisation (IB) and the Council of International Schools (CIS). Joram works closely with highly skilled colleagues to ensure effective staff recruitment, timetable, educational technology, professional development, child safeguarding, library, sports, and arts are developed across the school. His focus lies in improving teaching and learning at GESS to achieve the school’s strategic plan and become one of the leading educational institutions in Singapore.


Maclean Braganza

General Manager of GESS

Education:
Master of Business Administration, James Cook University, Australia

Work experience and professional focus:

Maclean has 16 years of experience in the international education sector. He joined GESS in 2016 and held various senior management functions at the School. Maclean has overseen the school’s transformation from a small to a large school and looks after all the business operations of the school. His focus lies on improving the student and parent experience through the implementation of the school’s strategic plan. He is passionate to drive change for GESS to emerge amongst the premier holistic international schools in Singapore

Maclean works collaboratively with the Senior Leadership Team and the Board of Governors at GESS and values the school’s not-for-profit orientation built with German and European foundations.

Education:

Christiane Kübler studied biology and chemistry at the Technical University of Darmstadt. She initially worked as a chemist in research and marketing.

Work experience and professional focus:

After a teaching position in Frankfurt, she taught at the Deutsche Höhere Privatschule, a German school abroad, in Windhoek, Namibia, from 1994 to 2002, both in the German and English-language IGCSE school streams, before taking over as head of the bilingual school branch at a large secondary school in Darmstadt. She has been head of highschool at GESS since 2014 and, in this role, has been a member of the GESS senior management team as director since 2023.

Her hobbies include sports and travel, as well as spending time with her family.

With her extensive experience in education, leadership and international expertise, Ms Kübler will serve as interim principal of GESS for the 2025-26 school year. She is committed to open, trusting and appreciative communication with the entire school community in order to further successfully expand the strategic goals of GESS and create an environment in which our students feel comfortable and can develop personally and academically.

Education:

  • Master of Education (MEd), University of Tasmania
  • Global education and leadership


Work experience and professional focus:

With almost twenty years of experience working as an educator in Singapore, Joram has been a member of the GESS faculty since 2009 and has held various positions before becoming the Academic Director in February 2022. He has overseen the school's successful reaccreditation with the International Baccalaureate Organisation (IB) and the Council of International Schools (CIS). Joram works closely with highly skilled colleagues to ensure effective staff recruitment, timetable, educational technology, professional development, child safeguarding, library, sports, and arts are developed across the school. His focus lies in improving teaching and learning at GESS to achieve the school’s strategic plan and become one of the leading educational institutions in Singapore.


Education:
Master of Business Administration, James Cook University, Australia

Work experience and professional focus:

Maclean has 16 years of experience in the international education sector. He joined GESS in 2016 and held various senior management functions at the School. Maclean has overseen the school’s transformation from a small to a large school and looks after all the business operations of the school. His focus lies on improving the student and parent experience through the implementation of the school’s strategic plan. He is passionate to drive change for GESS to emerge amongst the premier holistic international schools in Singapore

Maclean works collaboratively with the Senior Leadership Team and the Board of Governors at GESS and values the school’s not-for-profit orientation built with German and European foundations.

Anna Ciezczyk

Director of Preschool

Education:
Doctor of Education, National Institute of Education, NTU, Singapore
Master of Science in Administration, Leadership and Management, Walden University, USA
Bachelor of Education, UMCS, Poland

Start year at GESS:
2025

Krissy Holland

Director of Primary School, European Section

Education:
Bachelor of Education Training, Dunedin College of Education

Start year at GESS:

2017

Travis Klump

Director of Middle School, European Section

Education:

  • Master of Arts in Educational Leadership, Walden University
  • Bachelor of Arts in Elementary Education with a minor in Reading, Indiana Wesleyan University

Start year at GESS:
2024

Claudia Dicken

Director of High School, European Section

Education:

  • Second state examination, University of Tubinga/Germany
  • Studies of English and Spanish Literature, Linguistics, Didactics, Methodology and Education

Start year at GESS:
2018

Education:
Doctor of Education, National Institute of Education, NTU, Singapore
Master of Science in Administration, Leadership and Management, Walden University, USA
Bachelor of Education, UMCS, Poland

Start year at GESS:
2025

Education:
Bachelor of Education Training, Dunedin College of Education

Start year at GESS:

2017

Education:

  • Master of Arts in Educational Leadership, Walden University
  • Bachelor of Arts in Elementary Education with a minor in Reading, Indiana Wesleyan University

Start year at GESS:
2024

Education:

  • Second state examination, University of Tubinga/Germany
  • Studies of English and Spanish Literature, Linguistics, Didactics, Methodology and Education

Start year at GESS:
2018

René Behrendt

Director of Primary School, German Section

Education:

  • Second state examination, Johann Wolfgang Goethe University, Frankfurt/Germany
  • Study of the Magisterium in primary school

Start year at GESS:
2015

Stephan Spieker

Director of Middle School, German Section

Education:

  • Bachelor of Education, University of Paderborn, Paderborn, NRW, Germany
    2011
    Successfully completed the First State Examination for the teaching profession (GHRGe).
    Studies in German, History, and subject didactics in Mathematics.
    Previously studied Primary School Education with the subjects German, Mathematics, and Physical Education.
  • Master of Education, Teacher Training College Kleve (Studienseminar Kleve), Kleve, NRW, Germany
    2013
    Traineeship at Hauptschule Kleve-Kellen.
    Successfully completed the Second State Examination for the teaching profession with the subjects German, History, and Politics.

Christiane Kuebler

Director of High School, German Section

Education:

  • State Examination, Technical University Darmstadt/Germany
  • Biology, Chemistry

Start year at GESS:
2014

John Zobrist

Director of Innovation and Education Programs

Education:

  • Bachelor in Education, first class with honours, Secondary Education with Design and Technology specialism, Sheffield Hallam University, UK
  • Diploma in Leadership in Education (Faculty of Education and Institute of Educational Research) The Chinese University of Hong Kong

Start year at GESS:
2023

Education:

  • Second state examination, Johann Wolfgang Goethe University, Frankfurt/Germany
  • Study of the Magisterium in primary school

Start year at GESS:
2015

Education:

  • Bachelor of Education, University of Paderborn, Paderborn, NRW, Germany
    2011
    Successfully completed the First State Examination for the teaching profession (GHRGe).
    Studies in German, History, and subject didactics in Mathematics.
    Previously studied Primary School Education with the subjects German, Mathematics, and Physical Education.
  • Master of Education, Teacher Training College Kleve (Studienseminar Kleve), Kleve, NRW, Germany
    2013
    Traineeship at Hauptschule Kleve-Kellen.
    Successfully completed the Second State Examination for the teaching profession with the subjects German, History, and Politics.

Education:

  • State Examination, Technical University Darmstadt/Germany
  • Biology, Chemistry

Start year at GESS:
2014

Education:

  • Bachelor in Education, first class with honours, Secondary Education with Design and Technology specialism, Sheffield Hallam University, UK
  • Diploma in Leadership in Education (Faculty of Education and Institute of Educational Research) The Chinese University of Hong Kong

Start year at GESS:
2023

Mike Kewelar

Director of Technology

Education:
Professional degree as Administrative Officer in public service, Study Institute for Municipal Administration in Oldenburg/Germany

Start year at GESS:
2020

Valerie Zhao

Director of Finance

Education:
Master in Finance, Singapore University of Social Science

Start year at GESS:

2019

Jason Hoppner

Director of Operations and Customer Experience

Education:
GRCP (Governance, Risk, and Compliance Professional) – OCEG, 2024
GRCA (Governance, Risk, and Compliance Auditor) – OCEG, 2024

CertTESOL – Trinity College London, 1998

Start year at GESS:

2023

Katie Bradley

Director of Human Resources

Education:

  • Master in Human Resource Management, De Montfort University, Leicester, UK
  • BA Hons Wirtschaft und Geografie, Nottingham Trent University, UK

Start year at GESS:
2024

Education:
Professional degree as Administrative Officer in public service, Study Institute for Municipal Administration in Oldenburg/Germany

Start year at GESS:
2020

Education:
Master in Finance, Singapore University of Social Science

Start year at GESS:

2019

Education:
GRCP (Governance, Risk, and Compliance Professional) – OCEG, 2024
GRCA (Governance, Risk, and Compliance Auditor) – OCEG, 2024

CertTESOL – Trinity College London, 1998

Start year at GESS:

2023

Education:

  • Master in Human Resource Management, De Montfort University, Leicester, UK
  • BA Hons Wirtschaft und Geografie, Nottingham Trent University, UK

Start year at GESS:
2024