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.

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.

Natalie Stella Judelson, Director of Operations and Advancement
Natalie manages daily operations and the advancement work of the school including fundraising, marketing and outreach, and other strategic initiatives. Natalie holds a J.D. from Boston College Law School and a Professional Certificate in Fundraising from Heyman Center for Philanthropy and Fundraising at NYU. Natalie joined ISB in 2010.

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. He 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.



Christina Hultholm, Communications & Marketing Director
Christina holds an M.A. in Politics from Princeton University and a B.A. in Economics and International Relations from New York University. Christina joined ISB in 2013.

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

Danielle Valenti, Advancement Associate, Communications & Events
Danielle holds a B.S. from Binghamton University. Danielle joined ISB in 2014.


Kyle Vitale, Technology Director & Associate Director of Operations
Kyle holds an M.Eng. from Stevens Institute of Technology and B.A. from New York University. Kyle joined ISB in 2015.

Pat Hough, Technology Integration Director
Pat holds a B.F.A. in Painting and Drawing from Temple University and has over 25 years of teaching experience in Technology and Art. Pat joined ISB in 2013.


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

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

Karissa Nathan, Business Office Associate

Karissa holds a B.A. in English with a concentration in Business Writing from Lehman College. She also holds an M.A. in Post-Colonial Literature. Karissa joined ISB in 2018.


Rotana Suy, Admissions Associate
Rotana holds a B.A. in Liberal Studies with a concentration in Natural Sciences from California State University Long Beach. Rotana joined ISB in 2014.


Colleen Dischiave, Middle School Counselor and High School Placement Coordinator
Colleen holds an M.A. and Ed.M. in Psychological Counseling from Teachers College, Columbia University, as well as a B.A. in Psychology from University of California, San Diego. She is a New York State Certified School Counselor. Colleen joined ISB in 2015.

Kali Gerber, School Nurse

Kali holds a B.S. in Nursing form 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.


Kelly Hagen, Lower & Middle School Program Associate
Kelly holds a B.A. from Binghamton University. Kelly joined ISB in 2017.

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.

Kristen Moreland, Enrichment & Summer Programs Coordinator

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.


Eliot Osorio, Receptionist & Administrative Support
Prior to starting at ISB, Eliot worked for four years in various youth programs in New York City. He joined ISB in 2012.

Hector Castillo, Senior Facilities Associate
Jocsan Crespo, Facilities Associate

Marc Martinez, 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.