Meet our Staff and Faculty

  • Antoine Akouissonne-Duqueroix, French teacher

    As a former French teacher at institutions like the Lycée Français and Alliance Française in Toronto, Antoine joined GIST in 2024. With several years spent in Canada, he brings both French and European cultural influences, alongside a deep appreciation for Canadian culture.

  • Jasmine Bush, IB Coordinator

    Jasmine studied literature & languages and is an OCT-certified teacher. She has been teaching middle & high school for 20 years and is passionate about the neuroscience of education. She enjoys spending time with her family.

  • Maren Bödeker, Homeroom Teacher 7/8

    Maren holds an M.A.Ed (Gymn/Ges) in Art & German and brings over 20 years of experience to GIST teaching at all levels at a high school. Besides teaching, she follows another passion, working as an artist in residence in her studio.

  • Sierra Spanier, Head of Music and English Teacher

    Sierra graduated with a Bachelor of Music from Humber College and has been a music educator since 2011, teaching all levels and ages. When Sierra is not at GIST, she likes to watch documentaries, and going to live music.

  • Matthew Denton, Business Manager

    Matt joined GIST in 2023 to cover for Ms. Tamme while on leave. He holds a B.Comm from Queen's. Matt had been a Business Manager at a school for the past eight years, and prior to that worked in the Foreign Exchange and Fixed Income markets. In his spare time, Matt plays and coaches Ultimate Frisbee.

  • Isabelle Dieter, Homeroom Teacher 1

    Isabelle holds the position of homeroom teacher for grade 1. She studied elementary education in Koblenz and Frankfurt and joined the GIST in 2023. She enjoys ice skating, cooking, swimming, and travelling to new places in her free time.

  • Nafi Gaye, Kindergarten Teacher

    Nafi is a state-certified teacher and finished her studies in Frankfurt, Germany. She is also qualified to identify and support highly gifted children (Begabtenpädagogin). In her free time, she enjoys playing the guitar, nature and immersing herself in poetry.

  • Larissa Hartman, Head of Sports and Ethics Teacher

    Larissa holds a bachelor's degree in art therapy and a master's degree in education. She has been working for 8 years in various educational settings, including high schools, colleges, and private education for young adults with autism.

  • Rouven Hollmann, Principal

    Rouven became principal at GIST in 2023, having previously spent eight years as deputy principal at a German school in Japan. Most recently, he taught science and mathematics at a large high school near Düsseldorf with over 1200 students. In his free time, he enjoys spending time with his wife and two children.

  • Sabrina Hülsmann, Head of Kindergarten

    Sabrina studied at the Franz-von-Assisi Schule in Osnabrück and has been working for GIST since 2016. She enjoys spending time in nature, stargazing through her telescope, and spending time with her family and her Chinchilla.

  • Farwa Mahmood, Homeroom Teacher 5/6

    Farwa studied German and English (B.Ed) at the Johannes-Gutenberg Universität in Mainz. In her free time, she enjoys reading, discovering new places, taking pictures, and spending quality time with family and friends.

  • Adrienne Medjo, History and Civics

    Adrienne studied Arts, History and Philosophy at the University of Paris Nanterre X where she obtained a Master II. She also completed her studies with a PhD in French Literature, Drama option at the University of Laval in Quebec. In her free time, she likes to travel, visit museums, take dance lessons, go to jazz concerts, see Musicals and theater shows.

  • Thomas Pfanner, Head of Marketing and Admissions

    Thomas studied Arts, Nonprofit and Public Management. Prior to his current position he was a producer for a classical music festival in Austria and a consultant for LGBTIQ+ issues in the public sector. Thomas is passionate about music, public spaces and zines.

  • Annalena Reinert, Homeroom Teacher 9/10

    Annalena studied Secondary Education and was working as the Head of Aftercare before she became Homeroom Teacher. When she is not at school, Annalena enjoys snowboarding, hiking, and traveling.

  • Sher Sanker, Kindergarten Teacher

    Sher has a degree from the Mothercraft Society College and over 20 years of experience with children of all ages. In additio, she has a qualification as child therapist with a focus on autism. In her free time, she likes to go the theatre, enjoys baking and spending time with her family.

  • Sarina Sardone, Head of Aftercare

    Sarina holds a diploma in Early Childhood Education from Seneca College and taught Kindergarten in Munich, Germany, for seven years. Since February 2023, she has been working at the GIST. Sarina is an enthusiastic runner with seven half marathons under her belt, and she enjoys travelling and spending time with loved ones.

  • Claudia Scarlett, Homeroom Teacher 2

    Claudia has joined us in 2016 and holds the position of Homeroom Teacher Grade 2. She teaches German, Maths and Science in the primary grades. She studied at the University of Lüneburg and enjoys reading, dancing & exploring nature with her children.

  • Miriam Schulte-Zweckel, German Coordinator

    Miriam took over the position of German Coordinator at the GIST in 2021. She has been teaching German as a second language (DaZ) & as a foreign language (DaF) at elementary schools throughout her career.

  • Stephan Stoffelen, Head of Science

    Stephan has been successfully teaching science for more than 20 years to students ranging from middle school to college level. In his spare time, he is very passionate about art and music and loves to experiment in his kitchen.

  • Wiebke Tamme, Business Manager (parental leave)

    Wiebke has been working for GIST since 2018 and holds a M.Sc. degree in Finance & Controlling from the University of Erlangen-Nuremberg. Prior to GIST, she worked as Controller in Germany. Wiebke enjoys spending time outdoors, hiking and camping.

  • Elena Ulbricht-Jones, Administrative Assistant

    Elena relocated from Berlin to Etobicoke after completing her studies in biology. In the following years, she dedicated her time to her family, taught German part-time, and studied programming. In 2024, she joined us as Administrative Assistant.

  • Caroline Weißenborn, Homeroom Teacher 3/4

    Caroline studied elementary and musical education at the University of Erfurt as well as German as a second language at the University of Leipzig. She enjoys social dancing, acapella singing and hiking in nature.

  • Lara Woronowicz, Head of French

    Lara studied French, Spanish and German as a Second language at the University of Munich (LMU), the University of Bordeaux, and the University of Valencia. She teaches French in all grades. Lara enjoys learning new languages, travelling and reading.