All staff members of IST

At ISTwente Secondary we have an enthusiastic team of experienced teachers and support staff. The team represents the international profile of the school. As professional educators, staff members demonstrate their passion for international mindedness and thus for the spirit and ethos of the school.

Staff members are trained in working with the international curricula of the school and committed to their further professional development.

Anke Kolkman

Economics, Business Studies, DP Coordinator

Anke studied at the University of Twente, got her teaching degrees in Economics and Business Studies and recently finished a Masters degree at TIAS Business School of Tilburg University. She teaches Economics at IST and is also the International Baccalaureate Diploma Programme. This means that she is the contact person with regards to the IBDP which was established at IST in school year 2017-2018. Anke feels that teaching is about giving students a broad and deep understanding of the world in which we live, and Economics gives us a good view on what people, firms and governments do. Anke is married and has two children. Her hobbies are textiles, arts and crafts, gardening and reading.

Carina van der Vossen-Bijker

Teacher Year 2

Born and raised in Pretoria, South African Carina obtained her Bachelor Degree in Education from the University of Pretoria with main subjects in English, Biology and Afrikaans. After her final practicum in Australia, she taught at the John Calvin School in Albany for two years. After having been back in South Africa, she went travelling through Europe with friends and decided to stay and work in The Netherlands. Carina now enjoys the International School Twente classroom filled with a diversity of cultures. In her free time, she enjoys reading, hiking and mountain biking.

Carmen Repko

Humanities teacher/ History teacher / Exams Officer

Carmen joined the IST team in July 2019 after previously teaching at several Dutch schools. She grew up in the International School Community in Germany and Poland and has always seen the benefits in social wellbeing and cultural awareness that international education provides. Since then, she’s wanted to be a part of an international team to pay these benefits forward. To her, teaching students to the best of their and her ability, and getting to know students and seeing them grow into respectful, global citizens is the best part of her day.

Carola Flores Sardá


Carola is an Educational Psychologist and International School Twente’s Spanish teacher. She is from Lima in Peru and came to Enschede to obtain a master’s degree at the University of Twente. She has a wide experience in teaching children and adults. Carola is married and has two daughters. In her spare time, she enjoys cooking and baking. She loves to share her language and culture with her students.

Chris Bonke


Chris joined IST in July 2019 after living abroad as an international educator. He has worked at international schools in China and Malaysia as a history teacher and head of the humanities department. He is committed to increasing the quality of education by implementing the latest knowledge on learning, to fostering international mindedness, and to the growth of IST. Chris and his family greatly value being part of an international community. Chris’ wife comes from Thailand and he originates from The Netherlands. They have two children, one of whom is born in Malaysia and the other in the Netherlands.

Diana Redmeijer

Dutch Teacher

Diana teaches Dutch A and B. She studied Dutch Language and Literature and Comparative Literature at the University of Groningen, focusing on Language Philosophy for her thesis. After her studies at the University, she followed a professional education to become a teacher of Dutch as a first and as a second language. Diana has taught Dutch for twenty years to a variety of audiences; from refugees to staff members of the University of Twente. She has also written several articles about cultural diversity which She is passionate about wandering along the seaside, listening to the seagulls and the sound of breaking waves.

Dorothee Kellner

German Teacher, MOT support

Dorothee Kellner teaches German from year  7 to DP2. She also supports Mother tongue learners and students who choose to study additional subjects online. Dorothee grew up in Erfurt and attended the Universities of Jena, Göttingen and Groningen. She has a Master’s degree in European Culture and German Literature and Language as well as a Teaching Degree for Secondary Education. Before joining IST, she worked as a copywriter, translator and as a recruiter for a university. She also develops teaching material for an educational publishing house.

Dorothee very much likes the concept of thinking out of the box: within an international community you constantly are amazed how things and assumptions that are so natural to you aren’t that for the other. Making students aware of this and making them learn from each other is her passion.

Edwin Scheefhals

Economics Teacher

Edwin joined the team at IST in 2017 as a teacher of Economics but also as a mentor. Edwin studied International Marketing and he started his career as an Investment Advisor at a bank. After ten years, he switched careers and started teaching Economics and Management & Organization at Saxion university of applied sciences. Edwin is excited about helping students to see connections between theory learned in class and experience Economics and Business in ‘real life’.

Esther Dommerholt

Community Coordinator / Career Counsellor

Esther is our Community Coordinator. She makes sure that IST stays connected with her tight knit international community through events, the parent and student council, community projects and other extra curricular activities. She is also our CAS coordinator and Career / University Counsellor.
Esther is very enthusiastic about working with international students since she can explore and create local and global opportunities for her students to develop not only academically but also personally. Esther lives, along with her husband and her two sons, in Rijssen, a small town in the Twente Region. Her hobbies include travelling and listening to music.

Fadila DZambic

Reception/Year 1

After obtaining a Bachelor’s degree in Education, and a minor in Special Education from Edinboro University in Pennsylvania, Fadila spent four and a half years working with special needs children as a service coordinator ensuring they were getting proper services and care. Working with special needs children was both rewarding and challenging at the same time.
After moving across the Atlantic to The Netherlands, Fadila has begun her studies for her Master’s degree in Educational Leadership with anticipation on completing it May 2021. Fadila was a part of the IST community as a volunteer for two years with various responsibilities, prior to becoming the Reception/ Year 1 teacher. She is very excited and eager to learn more about students, families, and the IST community.

Gerard Houtman

Technical Lab Assistant

Gerard was born in Enschede about 60 years ago and grew up in Lonneker. After military service he started working at Polaroid in Enschede and there he also completed his studies as a chemical analyst. He worked for 29 years at Polaroid in the analytical laboratory and research lab and started in 2008 as a technical teaching assistant in chemistry at college Zuid. He is interested in students who are curious about how things work and what you can do with them. His hobbies are playing baritone saxophone in an orchestra and in a big band, camping, cycling, walking the dog and reading a book. He is married and has two daughters, a grandson and a granddaughter.

Iris de la Combe


Iris was born in Hardenberg and raised in Coevorden, both small towns north of Enschede. She moved to Enschede in 2008 to study Chemical Engineering at the University of Twente. After graduating, Iris obtained her teacher’s degree at the same university. She has worked at Het Stedelijk Lyceum and IST ever since. Iris takes a great interest in Science as a whole and enjoys teaching curious students at a personal and individual level. In her free time she enjoys horseback riding, playing the guitar, painting, reading a book or going to a rock concert.

Jason Wilson

Principal, Year 2/3 Teacher

After obtaining a Bachelor’s degree in Fine Arts from York University in Canada, Jason spent two years working in the residence of an international boarding school, counselling and tutoring students from all over the world. Despite his work with older students, he felt drawn to working with the school’s primary students, and returned to York to complete a Bachelor’s Degree in Education. After working in the Canadian public education system for two years, he was (and still is) very excited to be teaching in Enschede. He has a passion for Mathematics and games of all kinds, as well as Technology and Drama.

Letícia Giestas


Letícia Giestas was born in Portugal and since she was little,  she has always been passionate about natural sciences. She received a degree in Biochemistry from the University of Lisbon (UL) and a PhD from the New University of Lisbon (UNL). For several years she worked in scientific research in the field of biosensors. Letícia moved to Enschede with her family looking to provide an international experience for her children. She has joined IST to teach Biology in the IB Diploma Program.

Louis Veldhuis


Louis studied Biology and has taught Biology and Science in different schools. In 2011 he joined the International School Twente where he teaches Biology in all years. He enjoys his work at IST because of the inspiring atmosphere among students and staff. Louis is a mentor teacher and organises excursions and special activities, such as a trip to nature reserve Het Aamsveen. Louis is married and has children and his motto is: ‘Wonder, investigate and wonder again.’

Marjolein van der Pol

Physical Education

Marjolein is International School Twente’s (IST) enthusiastic Physical Education teacher. She feels that her PE lessons easily connect students from all over the world because they have to team up, coach and respect each other. Marjolein is a mentor teacher and she ensures that IST is able to offer many interesting sports clinics. Marjolein and her partner have two little boys and her hobbies are playing tennis, running, cycling and reading.

Martin van Hooijdonk

Teacher Year 5/6

Martin was born in New Zealand and began his working life in the horticultural field where he ended up growing fruit for export markets. After working with so many travelers he caught the travel bug and spent three years traveling before returning to New Zealand to complete his Bachelor of Education in 2006.

Martin has spent his teaching career traveling and working between New Zealand and The Netherlands, and immigrated to The Netherlands in 2016. He has taught groups 3 to 6 over the years at ISTwente and is currently teaching in IST D (Year 5/6). Martin is interested in the environment and sustainability and in his free time he enjoys reading and collecting music.

Mary Molloy

English Teacher

Mary is English language and English literature teacher at IST.  With her Bachelor and Master of Education she previously taught at several secondary schools. She also has many years of experience as a teacher, Teacher Trainer and Blended Learning Developer at Universities of Applied Sciences. Mary is passionate about creating environments that nurture and encourage creativity and critical thinking.  According to Mary, everyone is born with extraordinary capabilities, it’s crucial to provide students with classrooms that encourage self-development and self-worth. Learning takes place when students have fun, with teachers who insist that they become the best they can possibly be.

Milou Pasveer

Specialist Teacher - Music

Milou obtained her Bachelor of Music in Education at the ArtEZ Conservatory in Enschede, and focused on students with special needs in her final year. Her major is singing, but she also plays guitar, ukulele and piano. Milou has been teaching music at ISTwente Primary since 2015 and teaches twice a week. Singing is the starting point of her lessons, during which she focuses on composition, performance, listening and appreciation skills. Milou has always been interested in other cultures and loves to teach the students at ISTwente who are from different parts of the world. Besides music, she loves playing board games, crafting, doing yoga and spending time with family and friends.

Monique van Maanen

English Teacher

Monique is our English B DP teacher. She has worked for Het Stedelijk Lyceum for 20 years and has been an IB teacher for 10 years. Monique is passionate about the IB programme because she believes that it helps students develop into global citizens who are inquiring, caring, open-minded, reflective and principled human beings.

Neetu Gadoo

Teacher Year 3/4

Neetu was born and raised in India. She obtained her professional Teaching degree (B.Ed) in her native country and completed her academic qualification from GBN school as well.

As a student, Neetu actively participated in co-curriculum activities, and won Gold and Bronze medals in different dance competitions. She worked as a primary teacher at Nav Gyandeep School in India from 2014 to 2016, where she became associated with NGO which educates children from slum areas.

She immigrated to the Netherlands in 2016 in light of her husband’s work. Neetu is substitute teacher at ISTwente and enjoys the diversity and equality at the school, as well as learning about new cultures. Neetu’s motto is to “Believe in yourself and never neglect an opportunity for improvement or to learn new things”.

Nicole von Hollen

Reception/Year 1

Born in Johannesburg, South Africa, raised in Ontario, Canada, with some German flair thrown in, Nicolé seemed to be destined to work abroad. After obtaining her Bachelor of Life Sciences from McMaster University in Ontario, Canada, she realized she wanted to be a teacher. Nicolé then graduated from the University of Ottawa with a Bachelor of Intermediate Education. After work experiences with children aged 10 – 19, she headed back to Ottawa University to obtain her Primary Education Certificate. Nicolé takes full advantage of her time in The Netherlands to travel. She also enjoys bike riding, and crafting.

Nienke Snijders


Nienke teaches English language and literature. In addition, she has taken on the role of group 1 & 2 curriculum leader. Nienke obtained a Bachelor’s degree in English Language and Culture and a Master’s degree in English Literature from Radboud University. Pursuing her interest in education, she completed a teaching degree in international and bilingual education at Utrecht University. She lived in the UK as a student attending Sheffield University through the Erasmus programme, and as a pre-service teacher in Wales. She is passionate about the IB programme and its holistic approach to learning. In her spare time, Nienke loves to read and watch films and series. She is looking forward to making more time for painting and drawing.

Onno Diekman

Technical Lab Assistant

Onno received his degrees from Groningen University and teaches there as well. He joined International School Twente last year and made sure the science lab practicals were intensified.

Patrick Diepenbroek


Patrick is the Physics teacher and teacher of experimental sciences at IST. He finished Electrical Engineering and his MSc in teaching Physics at the University of Twente and worked in Indonesia for nine years at an international school near the capital.

Patrick has a strong passion for his profession and believes one has never finished learning. He likes to show his students the wonders that nature has to offer and – through a ‘hands-on’ and ‘minds-on’ manner – scrutinise a myriad of these wonders.

In his spare time, Patrick does his utmost to enjoy the wonders of nature himself, while hanging off rock walls (bouldering), or exploring the sea (SCUBA diving). He also spends his time on the mat doing Brazilian Jiu Jitsu.

Remko Lulof

Humanities, Geography, History and Global Studies

Remko obtained his degree in Physical Geography and has been teaching Geography, History, Humanities and TOK at IST for many years. He is also a mentor teacher. He would like his students to learn to be polite and considerate to others and respect the differences between people. In his lessons, he encourages students to be inquisitive with respect to events in the world but also to be critical. ‘Your actions at school shape your future.’

Robin Haigh

EAL Teacher

Robin began her career in 2005 working with children aged 0-11 and completed a FdA in Professional Childhood Studies. With an interest in special needs she spent several years as the acting SENCo, working closely with children with a range of needs and abilities.

This fuelled her passion for communication and she went on to complete a BSc (hons) in Speech and Language Therapy. Robin emigrated to the Netherlands from England in 2018 and was delighted to be offered the role as EAL teacher at IST where she can utilise her knowledge of language learning and speech development.

Robin has a particular interest in autism, speech disorders, painting and puzzles.

Sharon Stegeman

Education Assistant

Sharon Stegeman is class and education assistant at International School Twente as well as EAL teacher and DAL (Dutch Additional language) teacher. Sharon supports students and staff  to ensure that they have all the facilities to make teaching and learning easier. Sharon is Dutch and was born in the Twente region.

Stacey Roos

Mathematics Teacher

Stacey Roos is the Mathematics Teacher for the IGCSE and DP years. She coordinates Computer Science for the junior grades and is the teacher liaison for the Student Council. Stacey has a Masters degree in Applied Mathematics and taught in a top South African secondary school before moving to the Netherlands. Stacey believes that mathematical literacy is an essential tool to understand our modern data-rich world, and strives to give every student a comprehensive understanding of the mathematical concepts necessary to be well-informed, proactive global citizens. She loves board games and genuinely thinks that algebra is as much fun as Candy Crush!

Tom Hilgerink


Tom was born in Enschede and studied Chemistry at the University of Twente. After his graduation he also obtaining his teacher’s degree and started teaching Chemistry at our Dutch partner school.

Tom joined the ranks of IST not long after and enjoys teaching and working with students from all over the world. He is intrigued by Chemistry as it leads to a better understanding of the world around us as atoms and their interactions are at the base of everything.

In his spare time Tom enjoys listening to music and watching tv-shows.

Vincent Leatemia


Vincent’s love and passion for music started at a young age when LP’s would be played in his household. His musical taste varies from Bach to Rage Against The Machine. He loves teaching the next generation music because music itself is a universal language that connects and unifies people. He could not imagine a world without music.

Wendy Geling

Class Assistant

Wendy is originally from New Zealand, and moved to The Netherlands in 2012. She is a qualified Early Childhood Educator and one of IST’s class assistants. In her spare time she enjoys crafting and gardening, thus providing the International School Twente with the biggest courgettes we have ever seen!

Willem Puper

Visual Arts

Willem comes from Friesland, a northern province of The Netherlands which has its own language. He has been a passionate Arts teacher for over 40 years to students of all ages in a bi-lingual Dutch school. He enjoys the challenge of teaching international students at IST and is enjoying the new approaches to Arts required by the IGCSE and IB Diploma Programme.

Zoë Borgers-Price


Zoë was born in Lancashire, England and completed her Bachelor of Art degree with QTS (Qualified Teacher Status) in Leeds in 1998. She moved to The Netherlands, where she worked at the Prinseschool, originally through the European Platform, as a language assistant for 6 months. She then became the English teacher in the International department and Challenge group working with all ages of children and adults before it became the International School Twente.

Zoë enjoys reading, painting, jogging, hiking and camping.