St Nessan’s is very lucky to have a dedicated team of people who work hard to make our school a place of learning in a friendly and welcoming atmosphere and where our 700 plus pupils, their parents and other members of the community can feel comfortable at all times.
The school has four Junior and Senior Infant classes and three classes at all other levels, and we have a large teaching staff consisting of Class Teachers, Learning Support Teachers, Resource Teachers, E.A.L. Teachers and an Administrative Principal and Deputy Principal. This teaching staff is complemented by a team of Special Needs Assistants and our Ancillary Staff.
Here is our team for the school year 2019 – 2020:
Team Leaders
| Principal | Acting Principal | Acting Deputy Principal |
| Mrs. Marguerite Quinn | Ms. Marie McKeogh | Mrs. Carmel O'Brien |
Ancillary Staff
| Mrs. Sinéad O'Brien | Mrs. Audrey Dillon | Mr. Adrian McCoy |
Class Teachers
| Junior Infants | Senior Infants | First Class | Second Class |
| Ms. Jennifer Togher Ms. Michelle McCoy Ms. Sinéad O'Mahony Ms. Christina O'Brien | Ms. Valerie Marron Mrs. Catriona Vaughan Mrs. Eileen O'Connor Mrs. Janet Shinnors | Ms. Fiona Liston Mr. Tim Frawley Ms. Jill Farrell | Ms. Bernadette Kinsella Mrs. Norah Barry Mrs. Eimear Mulvihill |
| Third Class | Fourth Class | Fifth Class | Sixth Class |
| Ms. Sheila Hayes Mrs. Catriona Scanlon Ms. Crea McLaughlin | Mrs. Patricia Flynn Mr. Declan Kinnerk Ms. Ciara Moloney | Mr. Tony Kavanagh Ms. Niamh O'Dwyer Ms. Grace Moran | Ms. Geraldine Histon Mr. John Scanlon Mrs. Isobel Madden |
Resource Teachers
| Mrs. Anne Liston Mrs. Thomasina O'Mahoney Ms. Eimear Curtin Mrs. Liz Morgan Ms. Sarah Murphy | Mrs. Caroline Horgan Mrs. Anne Mehigan Ms. Leanne McMahon Mr. Barry Danagher Mrs. Emma Ryan | Ms. Marie Foley Ms. Angeleen Brosnan Mrs. Bernadette Gleeson Mr. Ronan O'Sullivan Mrs. Eylene Greaney |
Special Needs Assistants
| Ms. Martina Stedje Mrs. Una Kiely | Mrs. Marie Cowhey Mrs. Mary Power | Mrs. Joanne McCarthy Mrs. Caoimhe Collins | Mrs. Paula Dillon |