Meet Our Team



Executive Director

Odette Diaz

Deputy Executive Director



Director of Education


Registration Manager



Finance Manager

Angie Ahumada

Marketing Coordinator



Finance Assistant



Events Assistant


John Denine, Executive Director

John Denine has a Master’s degree in Secondary English Education from Georgia State University and a Bachelor’s degree in English from the United States Naval Academy.  He has excelled in transformational leadership, strategic planning, and operations management in his 21-year career as a public school International Baccalaureate educator and 24-year active and reserve career as a U.S. Navy Officer.  John has extensive travel and intercultural experience.  In his personal life, he enjoys reading philosophy, watching soccer, and planning his next international trip.


Odette Díaz Schuler, Deputy Executive Director

Odette Díaz Schuler has a Master’s degree in Museum Studies from The George Washington University and a Bachelor’s degree in Anthropology from Emory University. Prior to joining CASIE, she worked for 15 years in museums such as The Michael C. Carlos Museum at Emory University in Atlanta, GA; the Smithsonian’s National Museum of American History in Washington, DC; and the Explora Science Center and Children’s Museum in Albuquerque, NM. She enjoys reading, traveling, cooking, and generally relaxing at home with her husband and their two teenagers, who are International Baccalaureate and Waldorf students. 

Jill Sims, Director of Education

Jill Sims has a Master’s degree in Educational Leadership from Clark Atlanta University and a Bachelor’s degree in Education from The Ohio State University.  Her past work experience includes serving as a teacher, assistant principal, 12 years as a principal with the last 7 at an IB World School, Executive Director of Teaching and Learning for Marietta City Schools, and Executive Director of Academic Programs including all four IB Programmes. She enjoys reading, traveling especially to the beach, spending time with her husband and now-grown son and daughter, friends, and walks with her dog. 

Sarah Wells, Registration Manager

Sarah Wells graduated from the University of North Georgia with a degree in Business Administration with an emphasis in Management. She enjoys traveling, cooking, and playing fetch with her kitties. 

Fende Eseme, Finance Manager
Problem-solving rather than math led Fende to a Bachelor’s degree in accounting. As a finance manager, Fende oversees finance, budgeting, cash flow, accounting, and HR for CASIE. Her responsibility is to maximize insight from data. She is passionate about serving others, including volunteering her financial services to several organizations including the Boy Scouts of America, and BAFCUDA USA. Her hobbies include exercising, cooking, and writing.

Angie Ahumada, Marketing Coordinator

Angie Ahumada graduated from Kennesaw State University with a degree in Business Administration with an emphasis in Marketing. She has worked on the advertising agency side, as an Account Services professional for various brands like AT&T, Bed Bath and Beyond, Rich’s Foods, and RaceTrac. She volunteers as the immediate past President for The Atlanta Ad Club nonprofit. She enjoys traveling (prior to COVID-19), her dogs, eating out (also prior to COVID), bad movie podcasts, boxing, and houseplants.

Drew Schuler, Finance Assistant

Drew Schuler was born in Africa, spent his childhood in Europe and the Middle East, and currently lives in the United States. He has a history degree from Princeton University and has taught English in Cairo, Egypt. He has been helping out part-time at CASIE for more than five years, responsible primarily for accounts receivable and helping schools/districts navigate the payment process. He enjoys reading, cooking, and hanging out with his family.

Katherine Ahn, Events Assistant

Katherine Ahn is a recent graduate of Emory University, with a B.A. in Linguistics and Psychology. Being born and raised in Atlanta in a multi-linguistic background fostered Katherine's interest in pursuing a career in international education. Katherine hopes to gain more experience in exploring the IB and the different disciplines of international education. She is a matcha addict and loves to read cosmetology reports and journals. 


2635 Century Parkway NE
Suite 125

Atlanta, GA 30345 

United States of America

Tel: 404.848.9044

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