Your regional team

Last updated:


Picture of Robert Kelty

Robert Kelty

Head of Outreach and Development North America

Robert Kelty started his career in Crownpoint, New Mexico in the heart of the Navajo Nation with Teach For America in 2001. Since that time, Robert has served as a head of school, superintendent, senior manager for Teach For America, and as an elected official as the Coconino County Superintendent of Schools, where he worked with all levels of government and six indigenous nations.

As a head of school, Robert led Puente de Hózhó Elementary School, a Navajo immersion and Spanish/English bilingual program predicated on meaningful school integration and language preservation and revitalization. He now works with the International Baccalaureate as the Head of Outreach and Development in the DC Global Centre.

Robert received his doctorate from Northern Arizona University (NAU) and was awarded an honorary doctorate from NAU in 2008. He is a former Arizona Teacher of the Year, published in the Journal of American Indian Education, was a lead author to On Indian Ground: The Southwest (2021), and a signatory on an Amicus Brief to the Supreme Court of the United States concerning federal obligations to Native America education. Robert has two super-hero children, one in a Middle Years Programme in the DC/Maryland area and the other awaiting an IB education.

 Picture of Natalia Tieso

Natalia Tieso

Regional Development Manager for Latin America

Natalia Tieso was born in the city of Buenos Aires, Argentina, and has been involved in the education sector for over 20 years. She began her career as an English teacher and academic coordinator at pre-school, primary and secondary level in private and public schools. She went on to work in educational publishing as Editor and Academic Coordinator at Macmillan Publishers and subsequently as Head of Marketing at Richmond, Grupo Santillana. Natalia joined the International Baccalaureate Organization in 2012 as Buenos Aires Office Manager and is currently Regional Development Manager for Latin America.

Natalia graduated as a bilingual English and Spanish teacher from Sofía E. Broquen de Spangenberg Modern Languages teacher training school. She holds a Bachelor’s degree in English (Universidad Argentina de la Empresa, UADE) as well as a Specialist Qualification in Education Management (Universidad Torcuato Di Tella business school, UTDT). She has also completed postgraduate studies in Digital Marketing (Universidad Tecnológica Nacional, UTN) and Talent Management (Escuela Superior de Economía y Administración de Empresas, ESEADE).

In 2016, she obtained her Master’s degree in Education Management (Universidad Torcuato Di Tella, UTDT), having completed her thesis on the importance of hidden stakeholders in the development and implementation of public policies. In 2020, she studied a postgraduate course in Inclusive Leadership (Pontificia Universidad Católica Argentina, UCA).

 Picture of Dalit

Dalit Halevi

IBEN Manager – Americas 

Dalit joined the IB in 2014 and has worked in education for over 20 years. She has taught in a school offering the Diploma Programme (DP), coordinated the DP, and served in IB Educator Network (IBEN) roles such as workshop leader, site visit member, consultant and examiner. She is also the first IB member of staff to receive the IB Advanced Leadership Award.

Dalit holds a Bachelor’s degree in Psychology and a Master's degree in Educational Leadership. The IB mission statement is her motivation to support a network of educators in the American continent who are ambassadors of our programmes and who reach out to teachers and schools so that their students can have a better learning experience and be more successful in life.