List of Headmasters/Principals of St Joseph’s
| 1890 | Br. J.M. Costen | 1956 | Br. M.N. Geraghty | |
| 1900 | Br. J.V. Casey | 1960 | Br. D.P. Manning | |
| 1905 | Br. J.A. Browne | 1962 | Br. P.L. Brady | |
| 1916 | Br. M.L. O’Donoghue | 1965 | Br. J.A. McCaffrey | |
| 1917 | Br. J.A. Mulholland | 1969 | Br. T.P. Feeney | |
| 1920 | Br. M.L. O’Donoghue | 1973 | Br. T.T. Devane | |
| 1926 | Br. S. McGovern | 1974 | Br. J.L. Hannigan | |
| 1927 | Br. J.C. Wilson | 1978 | Br. J.M. Fahy | |
| 1931 | Br. S. McGovern | 1986 | Mr. Michael Foster | |
| 1932 | Br. L. Curran | 1999 | Mr. Aidan Giblin | |
| 1934 | Br. W.B. Kennedy | 2000 | Mr. John Keane | |
| 1937 | Br. T.G. Russell | 2001 | Mr. Brian O’Dwyer | |
| 1939 | Br. T.M. Keane | 2010 | Mr. Gerard Cullen | |
| 1944 | Br. M.F. O’Donoghue | 2019 | Mr. Patrick O’Brien | |
| 1951 | Br. T.P Condon | 2020 | Mr. Seán Stack |
List of Deputy Principals of St Joseph’s
| 1970 | Mr. Patrick O’Neill |
| 1973 | Mr. George Lyons |
| 1980 | An tUas. Micheál Ó’Catháin |
| 1997 | Mr. Aidan Giblin |
| 2004 | Mr. Christy Oonan |
| 2011 | Mr. Patrick O’Brien |
| 2019 | Mr. Seán Stack |
| 2020 | Ms. Alexandra Duane |
All material copyright St. Joseph’s C.B.S unless otherwise stated.