Scoil Iósaf N.S., Castlemartyr is a Roman Catholic School. The Patron of the school is the Bishop of Cloyne; Dr. William Crean.
The Board of Management has eight members. It is composed of two members appointed by the Patron, two elected parents; one mother & one father, two teachers, two members representative of the wider community.
The current Board took office in 2024.
A Board serves for four years.
| Patrons Representatives: | Fr. Frank O’Neill |
| Ms. Geraldine McDonald, Chairperson | |
| Community Reps: | Ms. Úna Butler, Treasurer |
| Ms. Vicki Murphy | |
| Teachers: | Ms. Sinéad Bevan, Acting Principal |
| Ms. Maria Sheehan (Acting) | |
| Parents: | Ms. Miriam O’Brien, Treasurer |
| Mr. Barra Ó Tuama |