Dame Siobhan Keegan graduated from Queen’s University Belfast in 1993. She has been a High Court Judge, served as Vice Chair of the Bar of Northern Ireland, Chair of the Young Bar, Chair of the Family Bar Association, Chair of the Bar Charity Committee and a member of the Bar Professional Conduct Committee. 

Dame Siobhan was the Judge in Residence at the Queen’s University Belfast and became a Bencher of the Northern Ireland Inn of Court, an Honorary Bencher of Gray’s Inn and an Honorary Bencher of King’s Inns in 2022. She was a member of the Judicial Studies Board (JSB) and was also the Northern Ireland representative on the FrancoBritish-Irish Judicial Cooperation Committee. 

Dame Siobhan has been the Presiding Coroner, the Senior Family Judge in the High Court of Northern Ireland, the designated Northern Ireland judicial member of the International Hague Network of Judges, was a Commissioner in the Northern Ireland Judicial Appointments Commission (NIJAC) and is now Chair of NIJAC. 

Dame Siobhan was made an honorary member of the Society of Legal Scholars. She was sworn in as Lady Chief Justice of Northern Ireland on 2 September 2021. 

In 2023, Queen’s University Belfast conferred upon her an honorary degree in ‘Doctor of Laws for Distinction in Public Service’.