On 16 December 2011, Eboe-Osuji was
elected as a
judge of the
International Criminal Court. He won the office in the fifteenth ballot in the
Assembly of States Parties. He took office on 11 March 2012. From September 2013, Eboe-Osuji – alongside Judges
Olga Venecia Herrera Carbuccia and
Robert Fremr – presided over the trial against
Deputy President William Ruto of
Kenya, who was accused of stoking a wave of killing for political gain after the country's contested
2007 elections. Early on, he warned Kenyan media and bloggers that anyone revealing the identity of a protected witness at the Ruto trial could be guilty of contempt of court; ICC
chief prosecutor Fatou Bensouda had previously complained that some witnesses were being intimidated in Kenya, some of whom withdrew from the case. Following Eboe-Osuji's own request, the Presidency of the ICC decided to reconstitute Trial Chamber V(b) in the trial against
Uhuru Muigai Kenyatta and replace him with Judge
Geoffrey Henderson in early 2014. However, Eboe-Osuji remained the Presiding Judge in Trial Chamber V(a) which continued to hear the case against Ruto and former Kass FM broadcaster
Joshua Sang until his term at the court ended in 2021. In April 2014, his chamber issued
subpoenas for several prosecution witnesses no longer willing to testify in the case. Shortly after, Eboe-Osuji told off the government of Kenya for turning to the principle of
sovereignty "at every convenient opportunity, with the evident aim of frightening judges". ==Judge of the Caribbean Court of Justice, 2025–==