Lady Justice Martha Koome became the first female Chief Justice to handle a presidential election petition when she led her seven-member bench to uphold the election of president-elect William Ruto.
Born in 1960 in Meru County, Lady Justice Koome has a Master of Laws in Public International Law from the University of London (2010), a Bachelor of Laws from the University of Nairobi in 1986 and a post-graduate diploma in law from the Kenya School of Law.
She was admitted to the bar as an advocate of the High Court in 1987 and started as a legal associate at Mathenge and Muchemi Advocates until 1993 when she opened her own law firm and became the managing partner until 2003.
During her time as a High Court Judge between 2003 and 2011, Justice Koome served in different capacities as head of Land and Environmental Division in Nairobi, Resident Judge in Nakuru and Kitale and at the Commercial and Family Divisions in Nairobi.
Philomena Mwilu - Deputy Chief Justice
Justice Ibrahim is the oldest of the seven Supreme Court Judges. He has a Bachelor of Laws degree from the University of Nairobi and was admitted to the Roll of Advocates in January 1983.
Having participated in the 2013 presidential election where they dismissed Raila's petition that challenged the election of President Uhuru Kenyatta, Justice Ibrahim missed out on the 2017 case due to illness.
Justice Njoki Ndung'u
Justice Wanjala, has a Bachelor of Laws from the University of Nairobi, Master of Laws from Columbia University, New York and a PhD from the University of Ghent, Belgium.
Before his appointment to Supreme Court in June 2011, he lectured law at the University of Nairobi for 20 years (1986-2004). He served as Assistant Director of the defunct Kenya Anti-Corruption Commission (KACC) from 2004 to 2009.
He is among the three longest-serving judges of the Supreme Court alongside Justices Mohammed Ibrahim and Njoki Ndung'u having been appointed as the first judges of the court in 2011. He has also participated in all the four presidential election petitions since 2013.
Justice Isaac Lenaola
Justice Ouko is one of the longest serving judicial officers having spent his entire cumulative 34 years of legal experience in the corridors of justice and is considered an insider who has worked and seen both the bright and dark sides of the judiciary.
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Justice Ouko was admitted to the roll of advocates in 1987, briefly worked at Mbogholi Msagha and Company Advocates for a few months before joining the judiciary as a District Magistrate and rose through the ranks within two years to become a Deputy Registrar of the High Court in 1989.
In 1997, he was promoted to judiciary's chief court administrator, a position he held until 2002 when he became the registrar of the High Court.
His first breakthrough as a superior court judge came in 2004 when he was appointed by retired President Mwai Kibaki as a High Court Judge and then to the Court of Appeal in 2012.
He was elected as president of the Court of Appeal in 2018 to take over from Justice Kihara Kariuki whose term had expired and was subsequently appointed to head the state law office.