Joe Santos, Head of School
Joe manages daily operations at the school including admissions, fundraising, and strategic development. He received a BSc in Zoology from the University of Reading, a P.G.C.E from Christchurch College, Canterbury and an M.A. in Educational Management from the University of Bath. Joe Santos joined ISB in 2013, and he has served as Assistant Head of School and Director of Middle School. Prior to joining ISB, Joe worked in schools in Gibraltar, the UK, Mexico, China, Brazil, and Spain.

Natalie Stella Judelson, Assistant Head of School
Natalie manages daily operations and the advancement work of the school including fundraising, marketing and outreach, and other strategic initiatives. She holds a B.A. from Tufts University and a J.D. from Boston College Law School. Natalie joined ISB in 2010.

Richard Brownstone, Director of Middle School
Richard runs the daily operations of the Middle School, managing student life, curriculum implementation, and professional development.  He holds an M.A. in Education from Teachers College, Columbia University. He has over 20 years of experience as an educator in New York City. Richard joined ISB in 2018.

Torsie Judkins, Director of Admissions
Torsie manages admissions and enrollment at ISB. Torsie holds a M.A. in Educational Leadership from Manhattanville College and a B.A. in Business Administration from North Carolina’s Wesleyan College. Torsie joined ISB in 2018.

Delphine Michaud, Director of Lower School
Delphine manages the daily life of the Lower School, overseeing faculty, professional development, student life and progress, curriculum implementation, and parent interactions. She holds an M.A. in Education from Bank Street College. Delphine joined ISB in 2007.

Rosa Torres, Director of Preschool
Rosa manages the daily life of the Preschool, overseeing faculty, professional development, student life and progress, curriculum implementation, and parent interactions. Rosa holds a B.A. in Early Childhood Education and is working on her M.A. in education at Hunter College. In 2011, she received a Blackboard Award for excellence in teaching. Rosa joined ISB in 2005.



Sandra Bueno, Events & Database Manager
Sandra holds a B.A. from Queens College. Sandra joined ISB in 2010.

Leah Krieble, Admissions & Advancement Manager

Leah holds a B.A in Psychology and Education from Macalester College and a M.S.W. from the Columbia University School of Social Work. Leah joined ISB in 2019.

Danielle Valenti, Communications Director
Danielle holds a B.S. from Binghamton University. Danielle joined ISB in 2014.



Jordan Genee, Technology Director
Jordan holds a B.A. in Communications from Temple University and a M.A. in Digital Media Design for Learning from New York University. Jordan joined ISB in 2019.

Kristen Moreland, Enrichment & Summer Programs Director
Kristen holds a B.A. in Russian and Linguistics from Grinnell College and a M.A. in International Education from New York University. Kristen joined ISB in 2018.

Melissa Mack, Diversity, Equity, and Inclusion Director

Melissa joined ISB in 2019. 

Krystle Goodwin, Program Associate

Krystle joined ISB in 2020. Krystle holds a B.A. from Saint John's University and an M.A. from The New School. 

Andrea Kientz, Assistant to the Head of School
Andrea holds a B.A. in German Literature & Culture from La Sorbonne Nouvelle University (Paris III). She also holds a trilingual Executive Assistant Diploma from Advancia-Paris Chamber of Commerce. Andrea joined ISB in 2013.

Jocsan Crespo, IT Support Specialist


Alan Sze, Controller
Alan holds a B.A. in Mathematics from the State University of New York Albany. Alan joined ISB in 2010.

Carolina Samano, Business Office Associate

Carolina holds a B.S. degree in Management and Marketing from Long Island University, Brooklyn Campus. Carolina joined ISB in 2020

Michelle Tran, Staff Accountant
Michelle holds a B.A. in Financial Accounting from Western Connecticut State University. Michelle joined ISB in 2015.


Kali Gerber, RN
Kali holds a B.S. in Nursing from the University of Minnesota. Kali joined ISB in 2018.
Dr. Elizabeth Helbraun, School Psychologist and Lower School Counselor
Liz holds a Psy.D. from New York University in Child/School Psychology and is a New York State licensed psychologist. Liz also has an M.S. in Early Childhood and Special Education from Bank Street College of Education. Liz joined ISB in 2010.

Lily Infante, Middle School Counselor and Placement Coordinator

Lily holds a M.A./Ed.M in Counseling Psychology from Teachers College, Columbia University. Lily joined ISB in 2019.



Mario Byrne, Facilities Associate

Hector Castillo, Facilities Manager

Eliot Osorio, Receptionist & Administrative Support

Yesid Rojas, Facilities Associate

Statement of Non-Discrimination International School of Brooklyn admits students of any race, color, national and ethnic origin to all the rights, privileges, programs, and activities generally accorded or made available to students at the school. It does not discriminate on the basis of race, color, national and ethnic origin in administration of its educational policies, admissions policies, tuition assistance programs, and athletic and other school-administered programs.