Hon. Jst. Ayoola is the former Chairman of the Independent Corrupt Practices and Other Related Offences Commission (ICPC), a position held since 2005. Prior to this appointment, he served in various judicial capacities in and outside Nigeria as Justice of the Supreme Court of Nigeria, President of the Special Court for Sierra Leone, President, Seychelles Court of Appeal and Chief Justice of the Government of Gambia.
In 1976, he was appointed a Judge of the High Court of Western Nigeria, and soon after, a judge of the High Court of Oyo State. He served as a Justice of the Court of Appeal of The Gambia (1980 – 1983) and was Chief Justice of the Gambia (1983 – 1992). He was Vice President of the World Judges Association in 1991 and Justice of the Court of Appeal of Nigeria (1992 – 1998). Whilst a Justice of the Court of Appeal, he was appointed President of the Court of Appeal of Seychelles in November, 1992 He became Justice of the Supreme Court of Nigeria in 1998 till his retirement in October 2003. He then became the Chairman of the National Human Rights Commission of Nigeria (2003 – 2005).
On 2nd August, 2002, the Secretary-General of the United Nations, Mr. Kofi A. Annan appointed him as one of the Judges of the Special Court for Sierra Leone to sit on appeal coming from Special Trial Court for Sierra Leone. He was elected as the Vice-president of the Special Appeal Court. He was also Chairman of the Working Committee on Law Reform of the Laws of the Federation of Nigeria, 2000.
The retired jurist ranks amongst the very few Nigerian judges that have shaped the course of the judiciary and justice dispensation in Nigeria and by extension, the continent of Africa. Hon. Justice Ayoola's well researched and analytical judgments and rulings in decided cases can hardly be faulted.
Hon. Justice Ayoola, who is also a renowned and respected arbitrator, still possesses the alertness, energy and intellectual capacity which stood out as his distinguishing characteristics throughout the span of his very rich career.
He continues to give the Firm guidance in the execution of her duties to clients. .