La Sierra International School first opened its doors on August 15, 2012 offering a quality education with an international vision and an emphasis on character formation. Currently, it has 453 students between grades K3 and Grade 12, and a staff of more than fifty teachers between nationals and foreigners.


Established in 2012 as a for-profit organization, La Sierra’s short history has been characterized by academic success, steady progress towards a shared vision, and resilience in the face of challenges.  A key factor has been the three Founders’ consistent emphasis on a commitment to ethical decision-making and to prioritizing the human side of school operations and academic life. 

The Board of Trustees is a policy-making body concerned with the effective management of resources, the provision of facilities, and establishing and maintaining good relations with the local community and beyond. 


  • Carolina Castro
  • Marlen Lacouture
  • Rocío Ospina
  • Claudia Parales
  • María Inés Castro

The School Director reports to the Board of Trustees and implements the Board’s vision by making day-to-day decisions about educational programs, spending, staff, and facilities. She is supported by a small team of experienced, highly qualified professionals, each with strategic responsibilities for different areas of school life.  


  • Laura Horbal – Director
  • Gustavo Alvarez – General Manager in charge of Finances and Operations
  • Adam Morgan – Middle/High School Principal
  • Liliana Caliz – Preschool/Elementary Principal