At OIS we are committed to lifelong learning for faculty and staff as much as for our students. We emphasise continuous professional development both on an individaul and on an organisational level. Our faculty consists of approximately 80 teachers, 13 support staff members and 29 administrators. The faculty at OIS, like our students, is a multicultural group with a wealth of international experience. Our current faculty represents 21 different countries.  Our teachers are highly qualified and certified in their respective fields with a large number holding advanced degrees.

At OIS we have a caring and secure environment that fosters respect and promotes awareness and acceptance of personal and cultural diversity. Our teachers use a student-centred approach to create an environment that encourages students to challenge themselves and to develop academically, socially and emotionally.

The OIS Senior Management Team:


Janecke Aarnæs, Head of School

At OIS since 2013
Member of the Board of ECIS (European Council of International Schools) since 2015
Post Graduate Diploma in Leading Innovation and Change, York St. John University, England 
Pedagogy and French didactics, Université de Montpellier, France 
Cand.Mag, Political/Social Sciences and languages, University of Oslo and Bergen
Economy and administration, BI - Norwegian Business School
Political Science studies from École des Hautes Études Internationales, Paris, France

Peter L_newweb

Peter Luitjens, Principal Secondary School & Deputy Head of School

At OIS since 1989
IB Coordinator from 2004 - 2009
Principal of Upper Secondary Division since 2006
Principal of entire Secondary since 2009
Bachelors Degree, University of British Columbia
Post graduate studies from Queen’s University, Ontario, Canada
and University of Bielefield, German


Susan McKinney, Principal Primary School

At OIS since August 2016
M.Ed. in Educational Technology, University of Missouri
Bachelors Degree in Linguistics, University of California, San Diego


Knut Sørlie, CFO & Head of Administration

At OIS since 2008
MBA from BI, Norwegian Business School
Executive MBA in Strategy, NHH, Norwegian School of Economics
Political Science studies from Institut d’Études Politiques de Paris, France