When she was two years old, her family moved to Malaysia where she and her sister attended an English school run by French nuns.
[3] When she was twelve years old, the family moved to Ireland[2] where she attended the Muckross Park College in Dublin.
[3] In 1965, Clark returned to Ireland and studied law at the University College Dublin,[3] where she met her husband.
[9] In June 2001, Clark was elected as one of the 27 so-called ad litem judges at the International Criminal Tribunal for the former Yugoslavia (ICTY) by the General Assembly of the United Nations.
[12] In 2003, she was elected to a nine-year term as a judge of the International Criminal Court (ICC), where she was tasked with the organization of the trials and the establishment of a judicial infrastructure.