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The ISL Board is composed of eight to twelve members who are representative of the community, who have shown commitment to the school, and/or who possess skills that are critical to the Board. At ISL, the Board is the guardian of the School and constantly monitors its success in fulfilling its mission. The Board and School Director therefore work in partnership to ensure that all the necessary conditions are provided to fulfil the aims defined by the school, anticipate what the needs might be in the future, and redefine the School’s policies in accordance with those needs.

Silvan is Vice President of Finance, EMEA at Kelly Services. He is from the Netherlands and has one child enrolled at ISL.
Silvan Hoevenaars joined the Board in 2016 and has one child enrolled at ISL. He is originally from the Netherlands, where he earned a Masters degree in Business Economics at the Erasmus University Rotterdam. He also holds an ACCA Accounting Qualification. Currently Silvan is Vice President Finance & IT at Kelly Services. Prior to ISL, Silvan was Chairman of the School Council at the American International School of Cape Town. His experience in interacting with different cultures and languages allows him to appreciate the perspectives, values and traditions offered by ISL’s international community.

Silvan Hoevenaars


Trevor is the General Counsel, Europe, Middle East, North Africa Vice President at Nestlé SA. He is British and the father of one student at ISL and two ISL graduates.
Born and brought up in the Chichester area, West Sussex, England, Trevor studied law at Brunel University, London. After further studies at the College of Law, Chester (Solicitor’s Final Examination), he joined Allen & Overy in 1984 and worked in their London office practising as a corporate / M&A lawyer. In 1992, he took over the responsibility for their Warsaw office advising on a number of important privatisations. He then moved to Prague where he was responsible for Allen & Overy’s Czech and Slovak offices and their Hungarian office. Trevor joined Nestlé in Switzerland in 1995 as a regional lawyer for Central and Eastern Europe. During his time at Nestlé, Trevor has been involved in many important merger and acquisition projects in Europe, North and South America and Asia. In 2003, he became General Counsel Europe and subsequently assumed the role of General Counsel Zone Europe, Middle East, North Africa.

Trevor Brown

Vice Chair

John is Vice President Finance at Medtronic International Trading Sàrl. He is Irish and the father of three ISL students.
John started his career in Finance after graduating from the University of Limerick in the Ireland. He moved to Australia in 2000 and has lived in Japan, China and Singapore before arriving in Switzerland in 2012. John joined Medtronic in 2001 and has served in various roles since then and today holds the role of VP Finance EMEA. He is married to Sarah and has 3 children at ISL – 2 in primary and one in middle school.

John Barrett


Nakisa is the Corporate Vice President Associate General Counsel at Celgene International. She has two children in the secondary school at ISL and is American.
Born in Chicago, Nakisa grew up, was educated and started her career as a lawyer in private practice in the US, before coming to Switzerland to obtain her MBA from IMD. She then spent a year working with the WHO before working in-house in the pharmaceutical industry. Nakisa has extensive experience working internationally and enjoys navigating the complexities of living and working in a multi-cultural and diverse environment. The powerful role that education plays in society and the importance of its evolution to match the future needs of students is a theme that Nakisa cares deeply about and is therefore committed to supporting the ISL board in successfully fulfilling its mission.

Nakisa Serry


Aline is the Business Development & Innovation Manager at Nestlé HQ. She has French and Swiss nationalities, and is the mother of one ISL student and one graduate.
Aline started her career at Nestlé in Vevey after graduating from Stanford University in International Food Economics and Management. Both her career in business development and her husband’s career lead them to live on various continents with their daughters. After Mexico and Japan, the family came back to Switzerland in 2009 where Cloé and Anaïs attended ISL during 8 years. Cloé graduated at ISL in 2017 and is now studying Veterinary Medicine in the UK. Anais is in her first year of the IB Diploma Programme at ISL. Aline brings to the board her passion in pedagogy and multicultural education, along with her marketing and business management background.

Aline Boisset Michaud

Marco is the Vice President of Base Materials at Tetra Pak International SA. He is Italian and is the father of one student at ISL.
Marco graduated from the University Politecnico of Milan as engineer in Business Administration. He has developed his career in sales, marketing and procurement roles, working for multinational corporations in the automotive and electronics industry before joining Tetra Pak in 2011 where he leads the procurement team as part of the supply chain organization. He likes working in multicultural environments and is focusing on long term strategy development. He lives in the Lausanne area since 2011; is married and father of a student at ISL in Year 7.

Marco Martelli

Javier is the Vice President of Finance MEA&DF Region at Philip Morris International. He is from Germany and is the father of three ISL graduates.
After graduating from ESADE in Spain, Javier worked for KPMG in Germany and USA. Three years later he joined Philip Morris international (PMI) in New York to take a number of positions of increased responsibility in Planning, Strategy, M&A, General Management and Corporate Finance. Throughout his 20+ years with PMI, Javier has lived in USA, UK and Switzerland, covering all geographic areas of the world except for Asia. Born as Spanish-German, he is married and has three 18-year old children who finished their IB diploma at ISL in 2019. Javier is passionate about traveling and exploring new cultures as well as sports (mostly skiing, biking and running). He loves to spend time with his family and has a genuine interest in education and how new technologies are impacting the way we interact and our society.

Javier Müller

Anand is the Shell Professor of Global Leadership at IMD. He is British and Indian and has his two children enrolled at ISL.
Anand is Dean of Faculty and Research and Shell Professor of Global Leadership at IMD. Anand’s research and teaching focuses on organizational transformation and board dynamics. He served on the faculty of London Business and Imperial College previously. He is British and Indian, and his two children are enrolled at ISL.

Anand Narasinhan

Doron is the Cyberspace Affairs Director at SICPA. He is Israeli and the father of one ISL student and one ISL graduate.
Doron Tenne is a former senior intelligence official and security leader with more than 30 years of military operations, intelligence, cyber security and all around security experience. Graduating B.A., in Middle Eastern Studies from Bar Ilan University, Israel (1990) and Executive MBA from the Tel Aviv University, Israel (1999). He currently serves as the Executive Security Director at a multinational company headquartered in Lausanne, Switzerland, developing enterprise-tailored, cyber-security strategies. Doron excels at making decisions in complex, evolving environments and is equally at ease with strategic-decision making as well as operational responses. As a part of ISL’s board, Doron has focused on supporting the school’s strategy and pushing for new educational initiatives and innovations that will enable our students to face a changing work and educational environment.

Doron Tenne

Costas is the Director of Human Resources at Philip Morris International. He is Cypriot and Canadian and the father of two ISL students and one ISL graduate.
After graduating from York University in Toronto, Canada, Costas began his career in market research working in different markets in Eastern Europe. He held different assignments after changing companies and arriving to Switzerland. He has held positions in sales, marketing, human resources, learning and is now leading training in Digital Marketing. Costas is very interested in learning and spends much of his time honing the tennis skills of his two boys.

Costas Vlahos

Tomoko is Co-Founder and CEO of Dermintel. She is also a Researcher and Writer for the Global Center for Digital Business Transformation, an IMD and Cisco Initiative. She is Japanese and is the mother of one student at ISL.
Tomoko has a background in international affairs and migration issues after graduating from Georgetown University’s School of Foreign Service and The Fletcher School of Law and Diplomacy. She started her career in international education where she developed two global businesses in children’s education and online learning. After obtaining her MBA from IMD, she followed her curiosity in science with a corporate career in the materials science and technology industries. Passionate about digitalization, and innovation, she is an expert in digital business transformations and a tech entrepreneur. Her unique worldview is informed by bridging Asia, Europe and the US where she has lived and worked.

Tomoko Yokoi

Tomoko Yokoi

Governance Information

More information about the Board and its role

ISL International School