Admissions Contact
Students on the stairs in the stairwell.

Our Team, Our Opening Hours and How to Reach Us

Greeting from the Principal

Dear Parents, Dear Students,

Welcome to SIS Friedrichshafen. It gives me great pleasure to introduce you to SIS Swiss International School Friedrichshafen, a jewel in the Lake Constance school landscape.

Our all-day school is located in the middle of the new educational campus in Friedrichshafen in the immediate vicinity of Zeppelin University and... On three floors, bright rooms with high-quality equipment offer the best conditions for learning and research.

In addition to bilingualism and cultural diversity, children, parents and teachers appreciate the personal, family atmosphere at SIS Friedrichshafen. With approximately 260 students, we are a manageable school community in which the individual support of each child is just as possible as the experience of a strong, lively, colorful community.

SIS Friedrichshafen stands for excellent academic education in two languages. Equally important to us is the development of the personality and the formation of the heart, which is concretized in our guiding principle REACH Respect, Enthusiasm, Altruism, Commitment and Honesty. Respect, Enthusiasm, Altruism, Commitment and Honesty are core values that shape our educational actions and interactions every school day.

Admission to SIS is possible not only at the beginning of the school year, but also during the year. Make an appointment with the principal at any time - we look forward to meeting you!

Manuela Heuthaler

Get to Know our School Management Team

Portrait photo of Manuela Heuthaler
Manuela Heuthaler


More about Manuela Heuthaler

Manuela Heuthaler


Manuela Heuthaler has been the principal of SIS Friedrichshafen since September 2022. She comes from the Rheingau region near Frankfurt and brings more than 20 years of leadership experience from different cultural contexts.

In Germany, she worked at four schools as a teacher and principal, and within six years she developed the Karg Foundation into one of the leading organisations in the field of supporting the highly gifted.

For Mercedes-Benz, she led school programmes in South Africa and the USA for more than ten years. As a trainer for conflict-sensitive peace work in Kenya, she also used her skills in development service. "

Portrait photo of Julia Maria Grötzinger
Julia Maria Grötzinger

Head of Secondary School (upper classes)

More about Julia Maria Grötzinger

Julia Maria Grötzinger

Head of Secondary School (upper classes)

Julia Maria Grötzinger has been teaching philosophy, ethics and French as well as the seminar course and TOK (IB) at SIS Friedrichshafen since September 2017. In the school year 2020/21 she took over as head of secondary school (upper classes) .

Julia Maria Grötzinger grew up in the Upper Swabian district of Biberach and became involved in voluntary work with the scouts and the youth culture association at an early age. After graduating from high school in 2009, she studied philosophy and French at the Albert Ludwig University in Freiburg. During this time she spent two semesters working as a foreign language assistant in Saint-Quentin-en-Yvelines, France. She obtained her second state examination at the Seminar Weingarten in July 2017.

Respectful interaction and criticially reflecting upon values and attitudes is of utmost importance to Julia Maria Grötzinger. Through this she would like to shape the future of the students. It is her greatest desire that the students grow into citizens of the world, capable of facing global challenges, and yet remain attached to their roots.

Portrait photo of Theresa von der Dellen
Theresa von der Dellen

Head of Secondary School (lower and middle classes)

More about Theresa von der Dellen

Theresa von der Dellen

Head of Secondary School (lower and middle classes)

Theresa von der Dellen has been a teacher at SIS Friedrichshafen since the beginning of the 2021 school year and teaches the subjects Physical Education and English. In the 2022/2023 school year, she took over as head of the lower and middle school levels at the Gymnasium.

Theresa von der Dellen was born and raised in the northern Black Forest, but since her student days in Konstanz, she cannot imagine a more beautiful place to live and work than the Lake Constance region. As a person who is very enthusiastic about sports and close to nature, Theresa von der Dellen was already active in many sports clubs as a child and teenager and practised coaching with great enthusiasm.

She gained experience abroad in English-speaking countries during her high school years in Oregon (USA) and during a semester abroad in Cork (Ireland) as part of her teacher training. She took her second state examination at the Weingarten Seminary.

When working with children and young people, Theresa von der Dellen is particularly interested in social interaction and the joy of learning. In sports lessons as well as in the classroom, the students learn to treat each other with respect and can develop their independence and individual skills.

Portrait photo of Sandra Huber
Sandra Huber

Head of Primary School

More about Sandra Huber

Sandra Huber

Head of Primary School

Sandra Huber has been teaching at the SIS Friedrichshafen Primary School since 2019 and took over as the head of primary school for the 2022/2023 school year.

Sandra Huber grew up in Oberkirch, Baden. Even in her youth, she enjoyed working with children and so she was a children's coach in the local athletics club for many years. After graduating from high school in 2009, she went to the USA for a year as an au pair. She then went on to study European primary education in Freiburg. In 2017, she came to Lake Constance for her traineeship and took her second state examination at the Meckenbeuren seminary.

It is important to Sandra Huber that the pupils develop into independent, respectful and cosmopolitan people at an early age and enjoy coming to school.

Teaching and Supervision Hours

At our day school, students are supervised from 7:30 a.m. to 5 p.m.


The exact lesson and supervision times vary between the different school levels.

Holiday Calendar 22/23

The school adheres to the official school holiday calendar of Friedrichshafen.


Holidays: Kindergarten

Start of academic year 22.08.22  
Christmas holidays 21.12.22 - 05.01.23  
Movable holiday 17.02.23  
Professional development day 17.03.23  
Professional development day 26.07.23  
Summer holidays 31.07.23 - 18.08.23  



Holidays: School

Start of academic year 12.09.22    
Autumn holidays 31.10.22 - 04.11.22    
Christmas holidays 21.12.22 - 05.01.23    
Movable holidays (Carnival holidays) 17.02.23 - 24.02.23    
Movable holiday 17.03.23    
Easter holidays 05.04.23 - 14.04.23    
Movable holiday 19.05.23    
Whitsun holidays 30.05.23 - 09.06.23    
Movable holiday 17.07.23    
Summer holidays 26.07.23 - 08.09.23    

You are invited! Have a look at our upcoming events.

26 January 2023

SIS Swiss International School Friedrichshafen: SIS Friedrichshafen: INFORMATION EVENING Secondary School, 6 p.m. (Registration at
Start: 18:00
End: 19:00

SIS Friedrichshafen

SIS Swiss International School

Fallenbrunnen 1
88045 Friedrichshafen

Phone: +49 7541 954 370



Office Opening Hours

Monday to Friday: 7:30 a.m. to 10 a.m and 2 p.m. to 4:30 p.m.

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