High School


List of 13 members.

  • Ms. Celeste Herrera 

    Assistant Head of School for Academic Administration and High School Director
    University of North Carolina--Chapel Hill - B.A.
    University of Pennsylvania - M.S.Ed.
  • Dr. Wendy Hirsch 

    Assistant Director of the High School and Dean of Faculty
    Northwestern University - B.A.
    Columbia University - Ph.D.
  • Nicholas Lechich 

    Assistant High School Director, Dean of Students
    Bowdoin College - B.A.
    University of Pennsylvania - M.S.Ed.
  • Lisa Stifler 

    Director of Individualized Student Programs
    Bates College - B.A.
    University College, Dublin - M.A.
  • Jeff Slack 

    HS Registrar, Attendance Coordinator, House Advisor
    Drexel University - B.S.
  • Terrill Caplan 

    Assistant Dean of Students
    Skidmore College - B.A.
  • Will Hummel 

    Director of College Counseling
    Pomona College - B.A.
  • Alexis Kipper 

    Assistant to Francee Sugar and Coordinator of Grade Level Events
    Teachers College - M.A.
  • Arlo Klinger 

    Educational Technologist and Coordinator of Senior Year Events
    State University of New York, Cortland - B.S.
    C. W. Post College - M.S.
    Teachers College, Columbia University - M.Ed.
    North Central University - Ed.D
  • Justine Fonte pronouns: she/they 

    Director of Health and Wellness
    University of California at San Diego - B.A.
    University of Hawai`i-Manoa - M.Ed.
    Columbia University - M.P.H.
  • Lynn Riggio 

    Middle and High School Nurse and Director of Health Services
    Albert Einstein Medical Center School of Nursing
    University of Delaware
  • Josie Diaz 

    High School Psychologist
    Teachers College, Columbia University - Ph.D.
  • Francee Sugar 

    Director of Learning Support Services, K-12
    Connecticut College - B.A.
    The Union Institute - M.A.
High School Office
(212) 423-5526

Attendance Hotline
(212) 423-5490
To report absences, lateness or early dismissal information
24 hours a day.


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See also, Faculty and Staff Directory

Middle and High School (Grades 4-12) Administration, Development, and Alumni
108 East 89th Street (Between Lexington and Park Avenues) 
New York, NY 10128
212.423.5200 | info@dalton.org
(K-3) 53 East 91st Street, New York, NY 10128
(4-12) 108 East 89th Street, New York, NY 10128