[3] She was formerly a judge of the High Court of Northern Ireland from October 2015 until her appointment as Lord Chief Justice, prior to which she practised as a barrister specialising in family law.
[6] For each of the financial years from 2013 to 2015, Keegan was the fourth-highest-earning barrister in Northern Ireland in terms of legal aid, having received £504,177 in 2012/2013,[7] £513,405 in 2013/2014,[8] and £427,632 in 2014/2015.
[9] On 23 October 2015, Keegan was appointed a judge of the High Court of Justice in Northern Ireland.
[4][10] She was sworn into office by Sir Declan Morgan, the Lord Chief Justice of Northern Ireland, at the same time as Denise McBride.
[11] This made Keegan and McBride jointly the first female high court judges of Northern Ireland.