New academic year: COVID-19 start of school plan.

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 & IT, International at Kelly Services. He is from the Netherlands and has one child enrolled at ISL.
Silvan Hoevenaars joined the Board in 2016. He holds a Masters degree in Business Economics from the Erasmus University Rotterdam and is Chartered Accountant. 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. Previous roles in the ISL Board include Transition Committee Chair and Treasurer.

Silvan Hoevenaars


Nakisa is General Counsel & Chief Compliance Officer at Galderma. She has two children in the secondary school at ISL and has dual American and Swiss nationality.
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 needs of our 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

Vice chair

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. Additionally, she is a Contributor. Tomoko is Japanese and is the mother of one student at ISL.
Tomoko is a writer, researcher and tech entrepreneur. Through her writing and research as a Forbes Contributor on digital innovation, and at IMD Business School’s Center for Global Digital Business Transformation, she advises organizations on digital transformation and innovation initiatives. She is an enthusiastic supporter of “follow your passion,” given her own personal experience. 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 and technology with a corporate career in materials science and fast-growing technology industries, as well as founding a tech startup.

Tomoko Yokoi


Tomoko Yokoi

Experienced professional in Business Development and Strategic Marketing Innovation in the Nutrition and Healthcare industry, Aline is the mother of one ISL student and one graduate. She has dual Swiss and French nationality.
Aline started her career at Nestlé in Vevey after graduating from Stanford University in International Food Economics and Management. Both her career and her husband’s career lead them to live on various continents. After Mexico and Japan, the family came back to Switzerland in 2009 where Cloé and Anaïs attended ISL. Cloé graduated from ISL in 2017 and is now studying Veterinary Medicine in the UK. Anais is in her last 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 experience.

Aline Boisset Michaud


Werner is the Senior Vice President Commercial at Philip Morris International. He is German, and has four children. His youngest daughter is currently enrolled at ISL.
Werner was born in upper Bavaria in South of Germany, where he enjoyed his childhood and graduated with a German Abitur. In 1990 Werner graduated with a masters in Business Economics at the Ludwig Maximilian University in Munich. After that, he joined Philip Morris in Germany as Sales Representative in Berlin. His career at PMI led him through various functions in Marketing and Sales, foreign assignments in Spain and Belgium, to his current position in the PMI headquarters in Lausanne. Since 2015 Werner is a member of the Senior Management Team of PMI as Senior Vice President Commercial with global responsibility. He has 30 years of experience in marketing and sales, and has led large organizations as Managing Director. Werner is married, and a father of three daughters and a son. His older two daughters are attending universities in Munich and Berlin respectively, Daniel graduated from ISL in 2020 and will study computer science in England. His youngest daughter is at ISL in year 8.

Werner Barth

Joanna is a Finance Director and Co-Founder of BOSREDON SA. She has a dual Polish and French nationality, and has two daughters, one currently enrolled at ISL.
Joanna is an economist. She holds a double master’s degree in International Economics and Human Resources Management from the Kozminski University in Warsaw. Joanna started and developed her career with France Telecom as Head of Business Operations Consulting and Solutions Integration EEMA, Indirect channels – SITA and Russia. After obtaining an Executive MBA in Corporate Finance at HEC Lausanne, she launched with her husband their own business, BOSREDON SA in 2012. She served also as a Treasury and Board Member at the MBA HEC Lausanne Association. Joanna has experience in working internationally in complex, multi-cultural environments, as well as the domestic swiss market. She has ability to lead and inspire a team of people with different nationalities and backgrounds.

Joanna Bosredon

Mike is the Vice President/ General Manager EMEA at Helen of Troy. He currently has his five children enrolled at ISL.
Mike is American from St. Louis married to Marta Saez de Heredia from San Sebastian Spain. Together they have five children at ISL. After graduating from DePauw University, Mike began his career with Nestle Purina Petcare in Sales in the USA. In 1999 he moved to Barcelona, Spain with Nestle Purina beginning his international journey that saw him holding different Sales, Marketing and ultimately General Management positions located in Dublin, London, Lausanne, and Copenhagen. After 20 years with Nestle Purina, in 2016 Mike and the Burke clan moved back to Lausanne with Helen of Troy, with the opportunity for the children once again to attend ISL, a driving force in the decision.

Mike Burke

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 8.

Marco Martelli

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.

Anand Narasinhan

Costas is a Director of Consumer Capabilities 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 the Global Head of Capabilities. Costas is very interested in learning and spends much of his time honing the tennis skills of his two boys.

Costas Vlahos

Onika Williams Herman

Governance Information

More information about the Board and its role

ISL International School