Meet our Board of Trustees







Dr. Catriona Moran is the Head of School at Saigon South International School in Ho Chi Minh City, Vietnam. Recognized by the National Association of Elementary School Principals and the State Department of Overseas Schools, Catriona was awarded the National Distinguished Principals award in 2013. Born and raised in Ireland, Catriona has vast international experience (Japan, Taipei, and Vietnam) and has spent more than 30 years in international education as a teacher, vice-principal, principal, and head of school.


James is currently the Head of School at the NIST International School in Bangkok, Thailand. He has worked at international schools since 1999 in Singapore, Switzerland, and Thailand. James continues to work closely with a wide variety of global educational organisations involving leadership training, school accreditation and evaluation, and developing school-wide systems that support global citizenship and intercultural learning.


Dr. Gerhard has been with SIS since 2015. He is a committed international educator who has held teaching and leadership positions in Kuwait, the Dominican Republic, Thailand, Burma, Sierra Leone, and now Korea. He was formerly an Economics, History, and Government teacher and has been a principal in Elementary, Middle and High Schools and has served as a Director of Schools. He has worked in both the AP program and with the IB program where he continues to serve as a Diploma Examiner.


Rami Madani is the Head of School at the International School of Kuala Lumpur. Over the past 27 years he has worked in schools in the Middle East, Africa, and Asia, serving students, faculty, and staff at all school levels. Rami has designed and delivered training programs on learning and leadership, worked with the IB Diploma Program as consultant, visiting team leader, trainer, and examiner, and participated in school accreditations with CIS and WASC.



Dr. Gregory Hedger has been Director of The International School Yangon, in Myanmar, since 2016. A native of Minnesota in the U.S., Greg has been an educator for over 30 years, and has served in educational leadership positions for 20 years in the role of school director at Cayman International School, at Qatar Academy, in Doha, and as superintendent at Escuela Campo Alegre in Venezuela. Greg has been involved in international education through his service on various boards, his contributions to various periodicals, and his work to promote the next generation of leaders through workshops and university instruction.


Karrie Dietz is currently Head of School at the Australian International School Singapore. Previously she was Founding Head of School at Stamford American School Hong Kong, and she has also served school communities in Thailand, Bangladesh, Uzbekistan and the United States. Karrie is passionate about collaborating with others to empower children to reach their full potential and make a positive difference.


Matthew serves as the Head of School at Nagoya International School, a diverse and inclusive community school in the heart of Japan. He is honoured to be able to support 29 schools from Okinawa to Hokkaido as the President of the Japan Council of International Schools. Matthew is a trainer for both the Principals Training Centre, where he focuses on curriculum & assessment leadership, and the Council of International Schools, where he provides team evaluator training. He has served on the International Task Force for Child Protection and is a regular leader of CIS accreditation teams. He is grateful to have been working within the EARCOS region for 25 years.


With two decades of academic research and teaching experience and more than a decade in leadership and governance, Dr. Marta Medved Krajnovic brings deep understanding, passion, and appreciation for international education to Western Academy of Beijing. Before joining WAB in 2018, Marta served as the Director of Stockholm International School for five years. She previously worked at the University of Zagreb as Associate Professor and Director of the Post-graduate doctoral program in applied linguistics. Marta has authored books and research articles on second-language acquisition and multilingualism. She has served as a board member of international schools and as chair and member of various Croatian and international educational committees and projects. She is currently a board member of the Academy for International School Heads (AISH). Having lived in Croatia, US, England, Ireland, Japan, Hungary, Sweden and now China, Marta has a rich appreciation for different countries, people, and cultures.



Margaret is currently Vice President of International Accreditation, ACS WASC. She has over 25 years experience in international education, ranging from international school teacher, middle leader, principal, head of school and service within the field of accreditation. In addition, she is Director of an environmental educational charity, serves on several education related advisory bodies and served on the former IB Regional Council. She was awarded the title of Emeritus Head in recognition of her leadership and years of service to ISS International School, Singapore.


Andrew is originally from Massachusetts and taught social studies to high and middle school students for four years in the United States before embarking on 28-year international school career in 1994. Andrew has a B.A. in history and English literature from Macalester College (St. Pail, Minnesota), an M.A. in political-economic geography from the University of Iowa (Iowa City, Iowa), and has a lifetime teaching credential from New York State. In 2002-2003, he completed the educational leadership program at the University of Oregon.


Edward Greene has served as the Executive Director of EARCOS since 2019. He holds a Ph.D. in educational leadership from the University of Florida, a master’s degree in English Literature from the University of New Hampshire and a B.A. cum laude in English from Elmira (NY) College. He has enjoyed a distinguished career having held several teacher and leadership positions across several continents. These include positions at Escola Graduada, Sao Paulo, the American Embassy School, New Delhi, the American Cooperative School, La Paz, Bolivia and Canadian Academy in Kobe, Japan. He also served as a High School Principal and District Director of Development and Innovation in the Chattanooga, TN Public Schools and also served as the Executive Director of the Louisiana State University Laboratory School. Prior to joining EARCOS, he held the position of Director of the International School of Amsterdam for 16 years.

In addition to school-based positions, Ed has extensive experience with membership organizations. He served on the ECIS Board of Trustees from 2006-2017, and held the position of Chairman from 2010-2017. Ed was also President of the Association for the Advancement of International Education (AAIE) from 2009-2011 and is a member of the AAIE Hall of Fame. He is well known on the conference circuit as a presenter, keynoter and as the founding editor of International Quarterly.

His publications and research interests include the principalship, assessment, the Socratic Seminar, compliance theory, alternative scheduling, the role of the library, teacher evaluation, school culture, Board Governance, accreditation, literacy, Visible Thinking, and leadership.