ISBの管理職者は、生徒たちが自分の可能性を最大限に追求することができるよう、教職員、生徒、保護者らとの共同作業に対する強い意欲をもっています。管理職チームの一員としてISBに着任するや、数日のうちに多くの生徒たちの名前を必ず覚えてしまいます。管理職者らとは、個々に予約をして面談できるほか、PTAミーティング、学長との月例懇談会（First Fridays with Bill 第一金曜日「学長と話そう会」）などで直接話をすることができます。管理職者らの略歴をご参照ください。
| Name | Dr. William H. Gerritz |
| Title | Head of School |
| Education | Ph.D. in school finance, leadership, and policy analysis M.A. in school administration B.S. in chemistry and mathematics University of California, Berkeley |
| Name | Dr. Ugo Costessi |
| Title | Deputy Head of School - Chief Financial Officer |
| Education | Dottore in Economia e Commercio University of Trieste (Italy) |
| Name | Mr. Andrew Davies |
| Title | Deputy Head of School for Learning |
| Education |
Ed.D, University of Bath - currently studying
|
| Name | Mrs. Usa Somboon |
| Title | Headmistress |
| Education | M.Ed. in Education Administration, Chulalongkorn University, Bangkok, Thailand (Honors) B.Ed. in Education, Chulalongkorn University, Bangkok, Thailand (Honors) Certificate “The Art and Craft of the Principalship” Harvard Graduate School of Education, Harvard University |
| Name | Mr. Philip Bradley |
| Title | High School Principal |
| Education | B.Sc. Hons in Geograpgy and Geology, University Coll. Wales M.A. K-12 Educational Administration, Michigan State University |
| Name | Mr. James Souza |
| Title | Middle School Principal |
| Education |
M.A. Counseling and Guidance, California Polytechnic State University (San Luis Obispo)
|
| Name | Ms. Annelies Hoogland |
| Title | Elementary School Principal |
| Education | M. Ed. Educational Leadership M. Ed. Guidance and Counseling B. Ed. Primary Teaching University of Sydney, NSW |