St. Joseph's N.S. is a mixed junior national school. It moved to its present site at Arden View, Tullamore in 1980. Prior to this, St. Joseph's was a junior primary school at Convent Road, Tullamore, now St. Philomena's. The school is at present a 25 teacher school with
- 1 administrative principal,
- 15 mainstream classes with 3 Special Needs Assistants [SNAs],
- I language class with one speech therapist
- 1 special class with 2 SNAs
- 4 special education teachers [formerly resource and learning support]
- 1 resource teacher for travellers
- 1 teacher for English as a second language
- 1 home/school/community liaison teacher
- 1 full time secretary
- 1 caretaker [shared with Scoil Eoin Phoil II]
- 2 cleaners