Your regional team


Picture of Paul Campbell

Paul Campbell

Head of Regional Development Americas

Since 1988, Paul Campbell has worked for the IB Organization in numerous capacities. He has assisted hundreds of schools and school systems in starting and sustaining IB programs. Over the years, he has been involved in creating the IB Educators Network; the organization's services to school districts; and advocacy work with universities and governments.

He currently serves as the Head of Development and Outreach at IB's global center in Washington, DC. He lives in Maryland with his wife, an archaeologist and specialist in historic preservation, and his daughter, an IB Diploma student at Albert Einstein High School, a public school in Kensington.

 Picture of Colleen

Colleen Duffy O’Brien

Communications and Marketing Manager Americas

Colleen joined the IB in 2010 and is responsible for delivering global marketing campaigns to IB schools across the Americas. These campaigns serve the IB’s current schools as well as to enroll new schools in the region. Colleen holds a Bachelor of Science degree in Economics, International Business and Spanish from Marquette University, USA, and an MBA with a specialization in International Marketing from the George Washington University in Washington, DC. She is a native English and fluent Spanish speaker.

Colleen has worked in marketing for nearly 15 years and began her career as an Agricultural Marketing Volunteer for the United States Peace Corps in Guatemala. She also managed the marketing of power supplies to Latin America prior to working with the IB.

 Picture of Natalia Tieso

Natalia Tieso

Regional Development Manager for Latin America

Natalia joined the IB in 2012 and has been involved in the education sector for over 20 years. Natalia graduated as a bilingual English-Spanish teacher from Escuela Normal Superior en Lenguas Vivas Sofía de Sprangenberg, beginning her career as an English teacher. Natalia was then appointed IB Diploma Coordinator at All Saint’s School in Buenos Aires, Argentina. She has worked as an editor and academic coordinator at Macmillan Publishers and as Head of Marketing and Academic Services at Richmond Publishing.

Natalia holds a Bachelor’s degree in English from Universidad Argentina de la Empresa and a certificate in Online Marketing from Universidad Tecnológica Nacional. She also holds a graduate certificate in Talent Management from Escuela Superior de Economía y Administración de Empresas. Natalia received her Master’s degree in Educational Management from Universidad Torcuato Di Tella in August 2016.

 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 an IB Diploma school, coordinated the Diploma Programme, 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.