[2] Her post-primary education was at the Convent of Mercy in Macroom, but she also attended the De La Salle, a secondary school for boys, for the higher level mathematics classes required for the Irish Leaving Certificate examination.
[2] Encouraged by Dr Patrick Brendan Kennedy, Siobhán began to publish research in 1956 and was appointed to the full-time post of Assistant in 1957.
Continuing her research career, she spent a year as a visiting lecturer in Royal Holloway College, University of London, in 1962-63.
[citation needed] In 1995 she was honoured with a Catherine McAuley award as a distinguished past pupil by the Convent of Mercy in Macroom.
[3] Her final publication came after her retirement, when she contributed a chapter on Paddy Kennedy in Creators of Mathematics: The Irish Connection.