Sorry but this form will not work without cookies enabled. Please adjust your browser settings to enable cookies to continue. For more information on how to do this please see ourPersonal Information Collection Statement.

  • An International Family

    Our diverse international community features students and staff from over 100 nationalities


  • Student Diversity

    Every aspect of Collège du Léman is geared towards creating a safe space for children to express and nurture their individuality.


  • Our People

    We benefit from talented and experienced faculty, staff and our Senior Leadership Team.

    College du Leman - SLT - Our People

  • Personalised Learning

    We value each student’s individuality as well as his or her integration into society. Our programme of studies prepares our students for the demands of a global 21st century.

    CDL prepares students for the worlds top universities

  • A range of activities

    The opportunities don't stop when the school terms end. We offer a range of activities for your child to discover, from ski trips to performing arts camps and guided GAP years

    Boarding Activities - Collège du Léman - International School of Geneva

  • A Safe Place to Grow

    Our safe and welcoming campus will be a home where your child can learn to be confident and independent


  • Say Hello

    Get in touch or visit us to discover what makes Collège du Léman an inspiring place to learn

    Front View Secondary Building

  • A Place to Call Home

    Whether your child is joining us at Pre-K or midway through their learning journey, we offer a nurturing environment that will make a huge difference to their future

    primary students collège du léman

  • Contact us

    We would love to hear from you, so that we can discuss what your child needs to thrive.

    Boys playing

Mathieu Hartmann


Middle School Principal

Middle School is an exciting transition from Primary School to High School, from child to adolescent.

In a safe, happy and purposeful atmosphere, we encourage, monitor and support both the academic and the personal growth of every one of our students.

A French national, Mathieu was educated at the University of Ulster and the University of Bath, before being awarded his Masters in Teaching and Learning by the University of Leeds. Beginning his career as a Science teacher in the UK, he rapidly progressed into a leadership position within the school, before arriving to Collège du Léman in 2012.

With a background rooted in Science and Environmental Health, Mathieu’s technological experience and focus on sustainability feeds directly into our own ethos on innovative teaching styles. He entered into his current role as Middle School Principal in 2016, having shown exceptional leadership skills and a developed global perspective.

Attuned to the interdependent nature of a learning community, he believes that the key to a student-centric approach to education is staff performance and is dedicated to providing personalised support and consistent evaluation to each member of his team. In terms of structure, he actively promotes the use of differentiated pedagogical tools to enhance students’ progress, whilst directly building links with the local and global society.