 The school's original teaching staff included Madame Quinton Rosse, Madame Coslett Heller and esteemed piano tutors Patricia Read and May Cosgrave(Sister of W. T. Cosgrave
)

Professor Patrick Joseph Griffith, a noted teacher fiddle/violin player, and collector of Irish Music, was a Director and Professor of the school during its early years, teaching Violin and Viola.Arthur Warren Darley composer who put music to some famous Irish ballads (The Boys of Wexford, "Boolavogue" and "Kelly the Boy from Killanne") was a professor at the school.The Leinster School's original location on Harcourt Street was followed by a move to Upper Stephen Street in 1982.