Green School operates in Indonesia under Yayasan Kul-Kul, a non-profit Foundation registered in Bali.


The Board of Trustees governs Yayasan Kul-Kul at the highest level. The members of the Board of Trustees are:

  • Ni Putu Tirka Widanti, PhD (President)
    Chair of Administrative Science at Ngurah Rai University, Bali
  • John and Cynthia Hardy
    Co-founders of Green School

Two of the main legally mandated responsibilities of the Board of Trustees are:

  • To establish and preserve the vision and mission of Yayasan Kul-Kul; and
  • To appoint the Board of Directors.


The executive management of Yayasan Kul-Kul is the responsibility of the Board of Directors, whose members are listed below:

  • Dennis Heffernan (Chairman)
    Principal and co-founder of Van Zorge, Heffernan and Associates
  • Ronald Stones OBE
    Education Consultant and Deputy Chairman of One East Asia
  • Derek Montgomery
    Green School parent and executive with United Bike
  • Peter Barge
    Green School parent and founder of Jamberoo Valley Farm
  • Nadya Hutagalung
    Eco-activist, media personality and founder of
  • Mickey Ackerman
    Professor and internationally renowned design leader and educator
  • Theo Bakker
    Foreign Counsel at ABNR Attorneys at Law
  • Chris Saye CPA
    Founder and Managing Director Of MarcWhittaker

It is the responsibility of the Board of Directors to act for and on behalf of Yayasan Kul-Kul. To read their biographies, click the button below.

Board of Directors Biographies


John Stewart is the Head of Green School and is responsible for leading all educational activities.


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