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Governing Body

As a Belgian not-for-profit association, ISF (International School of Flanders) Waterloo is managed by a Board of Directors with in depth experience in International Education and strategy including broad business management and personal development skills.

The Board is advised by an IT & Change Management professional, an international strategic Corporate Affairs expert and by the Head of School, Mrs Belinda Yates.

Meet the Board

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Kaisa Sorjonen – Board Chair / Finance & Legal Director

Kaisa has been a Board Director of ISF since 2013 and was appointed as a Board Chair in January 2020. She is also in charge of Finance and Legal matters in the school. She acts as a director of ISF International Daycare and Rainbows vzw, overseeing ISF’s co-investment in two international day-care creches in Antwerp.

In 2010, after ten years at Euroclear Bank in Brussels in various management roles, Kaisa became Business Manager at Antwerp British School, with responsibility for Finance, Business, HR, Marketing and Facilities. With her partner, she owns Navitas Group and in January 2013 launched ‘Food for Kidz’, providing healthy meals for crèches, primary and secondary schools in the Antwerp area.

Kaisa holds a Bachelor's degree in International Business Management and is currently studying for a Masters in HR at the University of Salford in Manchester UK. She is fluent in Finnish, English and Dutch, and has two children.

Isf retouched 021 1Pastor Mike Nwanegbo – Parent Director

Mike is a pastor, author, motivational speaker, and recording artist. As a young man Mike was a powerful and skilful footballer, and played semi-professionally in Belgium between 1992-95.

In 2002, Mike was sent from England to lead the RCCG New Life Assembly church in Antwerp, and to co-ordinate the Belgian Mission of the Redeemed Christian Church of God, a Pentecostal church established in 130 countries.

New Life Assembly is a family and international parish with over 19 nationalities aimed at giving new life to people through the preaching of the Christian gospel,  and is now one of the biggest churches in Belgium.

A graduate of the University of Port Harcourt, Nigeria, and also of the Continental Theological Seminary in Brussels, Mike is married to Pastor Boma Nwanegbo and they are blessed with three lovely girls. A board member of ISF Trust since 2009, Mike moved his daughters to our school in September 2013. He is therefore also the Parent Representative on the board.

Isf retouched 019Rianne Vandersteegen-Buist - Board Director

Rianne previously worked as a registered nurse in Holland. In 2005 she started a Daycare in Antwerp and followed with a second one in 2013 with the assistance of ISF Trust.

In 2016 Rianne assisted ISF Waterloo in establishing ISF International Daycare in Waterloo and the following year in Tervuren.

Rianne is an active member in the Local Consultation Childcare in Antwerp.  She is a graduate of Leiden University and holds her MA in Developmental and Educational Psychology.

Rianne is married to Louis Vandersteegen and they have two children and two foster children all of whom enjoy going to ISF Waterloo.

Jacques neyns

Jacques Neyns – Board Adviser on Major Change Projects

Jacques began his career as a Science teacher, switching to IT in 1984,  the year the first Apple Macintosh was launched. One year later he began training end-users in the use of Macs, and later in the use of Windows platforms.

Following a postgraduate programme at the University of Brussels, Jacques is now Fulfilment Manager at SMART.doc, combining his training and project management skills to ensure that clients are satisfied with the technology solutions delivered.  He is especially focussed on the “change process”, not only of the technology, but specifically on the human factors.

Jacques is a long standing member of the Project Management Institute Belgium and is the liaison officer for the PMIef, the educational branch of PMI. Jacques advises the School Board on major change projects, and mentors the School Leadership Team in delivering our new technology platforms.

Jacques has a Masters in Chemistry with a teaching degree and Post University degrees in Project Management and Corporate Performance Management. He is fluent in Dutch, English and French. Jacques is married to Hilde, has two adult children and three lovely grandchildren.


Gui athiaGui Athia- Board Adviser to the Marketing Committee

An international strategic Corporate Affairs leader who anticipates risks and opportunities, objectively advises the business, and effectively advocates across different regions and sectors, proven over more than thirty years in telecom, automotive, consulting, tobacco, and sporting goods, in the Americas, Europe, the Middle East, and Africa. Builds up businesslike scenarios and creates competitive strategies, integrating valuable professional experience with both a relevant educational background and an academic career. Gui is an  experienced team builder who successively selects strong people and creates effective teams, leveraging diversity, cooperation, and respect to create a climate in which people can take risks and capitalise on unrealised potential. Gui is Brazilian, speaks Portuguese, English, French and Spanish and his two children attend ISF Waterloo.

To contact the Board directly please send an email to: