Mark Hardeman joined the BBIS community as Director in August 2023. With over 20 years of experience in international education, Mark has previously worked in Kuwait, Abu Dhabi and Beijing, and Dar es Salaam. He is a strong advocate for personalising education and believes that all students should have opportunities to explore and develop their passion for learning. Mark's educational credentials include a Doctorate of Educational Leadership from Lehigh University. In addition, Mark holds a Masters of Educational Leadership degree from the University of Wollongong, Australia and Bachelor of Arts and Education degrees from the University of Windsor, Canada.

Frank Kasch joined BBIS in 2024 and holds a BA in Lighting Design as well as an MBA in Media and Communication. In his previous roles, he supported teams as the Technical Director of a musical, a Lighting Designer for various arena shows, and the Project Manager for the general renovation of the Cologne Opera. He also served as the CFO of ROC GmbH. In addition to his work in culture and media, Frank has experience as a business consultant in housing finance and real estate. Born in Germany, he spent most of his life in Sweden and shares a passion for handball with his family.

Beth Dressler brings a diverse perspective given her experiences working in independent and international school settings in Thailand, the United States, Australia, Malaysia, Indonesia, and Germany. For the last twenty years she has worked in International Baccalaureate schools and is a long standing IB Primary Years Programme workshop leader, consultant and visiting team leader. She holds a Master’s Degree in Teaching English to Speakers of Other Languages (TESOL) from Michigan State University, a Certificate of Educational Technology and Informational Literacy (COETAIL), and holds a certificate in international school leadership from the Principal’s Training Center. Beth is committed to international education in Germany and serves on the Board of AGIS (Association of German International Schools). She lives in Potsdam with her family.

Lisa Roy joined BBIS in 2003, accompanied by her German husband and two children, taking on the role of IB PYP Curriculum Coordinator. Prior to her arrival, she had gained extensive experience as an educator in diverse international settings, including the Democratic Republic of the Congo (formerly Zaire), Stuttgart, Germany; Minnesota, USA; and Bali, Indonesia. Lisa holds a Master of Science in International Education and a Bachelor’s Degree in Elementary Education, both from the University of Minnesota. She is also an IB PYP workshop leader, school visit leader, and consultant. In her role as Deputy Primary School Principal, Lisa is dedicated to nurturing strong relationships with students to support their well-being, while ensuring that their voices and agency are honoured in the learning process.

Trixie Siemens joined BBIS after working in schools in Canada, China, Romania and Tanzania. She completed her undergraduate studies at the University of British Columbia in Canada, and holds a Masters of Arts in Educational Leadership from the University of Bath in the UK. She began her teaching career in the field of science and was an IB DP Examiner and IB MYP Moderator for the Personal Project. Currently, Trixie serves as a chair for international accreditations for both New England Association of Schools & Colleges and the Council of International Schools, giving her an opportunity to support educational review and development for schools around the world. Trixie is passionate about supporting holistic student development.

Dan Stiles joined BBIS in January 2015 to work in the Science Department. He studied Biochemistry in Manchester, and has a PGCE in secondary science education. Dan has held a number of positions at BBIS, including Teacher of Biology and Chemistry, Duke of Edinburgh’s International Award Coordinator and IB MYP Coordinator. He is now the Deputy Secondary School Principal with a focus on student wellbeing, behaviour management, and student life. Dan values the importance of building relationships with students, parents and teachers, and will often be found out of his office talking to our students. He is married with a young daughter and dog, and they live in Berlin.

Jane Barker joined BBIS in 2004 as a member of the English department. She earned her bachelor's degree in English Literature from Manchester University and a master's in Applied Linguistics from the University of Surrey. Jane completed her teacher training at Sheffield University and spent several years teaching in Madrid before relocating to Berlin. In addition to her teaching role, Jane has served as Head of English and as the IB DP Coordinator. At present, she holds the position of Deputy Secondary School Principal for Grades 10-12, focusing on student well-being, student life, and teacher development. Jane holds dual British and German nationality and has three grown children.

Jonathan Matthews-Hirsch (BA Hons, PGCE, MSc) joined BBIS in 2009 and has a career in education spanning over 20 years with the last 10 dedicated to the area of student support and special educational needs. In that time, Jonathan has taught in a variety of educational establishments ranging from mainstream schooling to special education, from Kindergarten to university level, and in diverse locations including London, Prague, Manila, Brighton and Berlin. In addition to heading the Student Support Services, he serves as Learning Support Coordinator.

Steve Crossley joined BBIS in January 2021 as Head of Boarding, having previously worked in boarding schools in the UK, Austria and the United States. Steve is a level 3 boarding practitioner and holds the BSA Boarding Management diploma, in addition to a BA in politics and history from Salford University and a PgDip in pastoral care, guidance and pupil support from the University of Aberdeen. Steve is married with two daughters.

Maryam Ferdosi joined BBIS in 2019, transitioning from her previous roles in Dubai where she was involved with the British curriculum and International Baccalaureate schools as the Head of the ICT Department, Innovation Leader, and Computer Science/ Design Teacher. Additionally, she has also contributed as an IB DP Examiner. Maryam holds a Bachelor’s degree in Computer Engineering and a Master's degree in Information Systems Management from the University of Salford. Her approach to integrating technology in education reflects a thoughtful and continuous learning journey, which she has carried into her current role at BBIS, helping to enhance educational experiences through technology.