Máire has been a Member of AGI since 1990. She began her career while a student at UCD, working part-time for the Genealogical Office. She returned to the field some years later and eventually applied for AGI membership. Later she took the Local Studies course at NUI, Maynooth, obtaining a diploma in 1997.
Over the years she has taught Adult Education courses at a number of locations in Dublin. She has served on the Board of the National Library of Ireland, the Irish Manuscripts Commission and the National Archives Advisory Council. She is joint author of the guide book Tracing Irish Ancestors, published in 1997. In 2005 she was elected a Fellow of the Irish Genealogical Research Society.