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The Berlin Brandenburg International School GmbH is a state certified day and boarding school and is a registered non-profit organization. The five member Supervisory Board is elected according to by-laws.

Business, community and education leaders join our parents and two managing directors to ensure BBIS maintains its commitment to our values – pioneering, caring, reflective and excellence.

The board of directors created positions for two directors. Peter Kotrc, School Director and CEO, is responsible for leading and ensuring high quality of the educational programmes. Burkhard Dolata is the Business Director and CFO responsible for administrative and financial management.

The management team of BBIS is composed of both directors, the principals of the Primary and Secondary Schools, as well as the heads of Student Support Services and of Boarding.

Management Team

Peter Kotrc joined BBIS in August 2012 as its Director, following leadership positions in Vienna and recently in The Hague. His links with international education and the International Baccalaureate go back to 1980 when he started working in international schools. He holds an MA in Humanities from Vienna University and an MA in International Education from Oxford Brookes. Peter Kotrc is married with one son.




Business Director/CFO 
Burkhard Dolata
 started work as CFO in January 2004. He holds a degree in General Business Administration and a German Business Diploma (Diplomkaufmann). Previously, he worked as Executive Software Specialist and Finance Director for international computer and technology companies. Until 2003, he was an Executive Board Member of a Residential Building Corporation in Berlin. Burkhard Dolata was born and raised in Germany, is married and has four children.






Secondary School Principal - DP/CP Programme
Andrew Hand 
holds education degrees from Flinders University South Australia and joined BBIS in 2015 after a successful career with top positions at the Pembroke School Australia, the International School of Penang, the International School Gevena and recently at UNIS, New York. He is a also an active musician and leads our staff vocal ensemble.





Secondary School Principal - MYP Programme
Michaela Jung
 holds an MA in Education and started her IB teaching career at the Anglo European School Ingatestone, England in 1990. In addition to teaching, she acted as Managing Editor for the educational publisher Scholastics in London for several years. Michaela joined BBIS in 2004, and has since worked as a language teacher and MYP Coordinator at the school. In 2010, she took on the role of Middle School Principal. Michaela has one son and shares her family’s passion for sports.




Primary School Principal
​Jonathan Butcher
holds an MA in International Education, the IB Teacher Award, and IB Advanced Certificate from Bath University. He has the Certificate of Advanced International School Leadership from the Principals Training Centre. Jonathan has taught internationally in schools in Australia, Switzerland, Thailand and South Korea, as well as England, and most recently in Malta as principal. He is a CIS school visitor, and IB workshop leader. His wife is an early childhood teacher and they have two children, who both attend BBIS.





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




Head of Boarding
Whitney Sterling joined BBIS in October 2007. He completed his BA at Yale University and a Masters of Education at Hamburg University. A qualified English and German teacher in both the United States and Germany, he gained high school principal certification at the Boston College Lynch School of Education. He came to BBIS after an 8 year headmastership at a German boarding school. Whitney Sterling is married and has three children. 





Supervisory Board

Dr. Frank H. Walter-von Gierke

Attorney-at-Law from Germany (Potsdam), shareholder of BBIS, three children at the school 1990-2016, board member since 2001

Lifelong Honorary Chair
Christian C. R. Dahms

Businessman from Düsseldorf, shareholder of BBIS, board chair 1999-2012


Markus Beran
Banker from Germany (Kleinmachnow), three children at the school, board member since 2013.

Dr. Ulrich Vest
Chief Financial Officer from Germany (Berlin), one child at the school, board member since 2012.

Prof. Dr. Daniel Koerfer
Historian from Switzerland, teaching at the FU Berlin, two children at the school 1996-2009, board member since 2015.

Kent Logsdon
Chief of Mission at the US Embassy, Berlin, one child at the school, board member since 2016.