Sri Thottathil B. Radhakrishnan was sworn-in as permanent Judge of the High Court of Kerala on 14th October, 2004. He is the son of late Sri N. Bhaskaran Nair and late Smt. K. Parukutty Amma, both Advocates, who practised at Kollam. Born on 29th April, 1959, he had his early schooling in St. Joseph's Convent and Government Boys' High School, Kollam; Arya Central School, Thiruvananthapuram and secured ISC conferred by the University of Cambridge (Local Examination Syndicate), having studied in Trinity Lyceum, Kollam. After obtaining B.Sc. Degree in Zoology from University of Kerala as a student of the Fatima Matha National College, Kollam, he secured LL.B. Degree from Bangalore University having studied Law in K.G.F. Law College, Kolar Gold Fields. Enrolled on 11th December, 1983, he practiced at Thiruvananthapuram as junior to Advocate late Sri P. Ramakrishna Pillai and thereafter shifted to High Court of Kerala in 1988 as junior to Senior Advocate late Sri P. Sukumaran Nayar.
He dealt with cases in different branches of law, the areas of his prominent practice being Civil, Constitutional and Administrative Law. He appeared also for various institutions including banks, university and other public institutions. He also appeared for the High Court of Kerala. He was appointed as 'amicus curiae' in different matters and was Advocate-Member of the Rule Committee constituted under Section 123 of the Code of Civil Procedure. While an Advocate, he was invited as Resource Person by the Training Directorate which later became the Kerala Judicial Academy. He also addressed various programmes of Legal Services Authority and training programmes for Advocates.
As Judge, he was nominated by the Hon'ble the Chief Justice to deal with original petitions registered following directions of the Supreme Court in relation to mental health matters. He was the President of the Board of Governors of the Kerala State Mediation and Conciliation Centre and the President of the Kerala Judicial Academy. On various occasions, he was invited as Resource Person to the National Judicial Academy, Bhopal and the Kerala Judicial Academy. He had also attended various national conferences on different subjects of critical importance. He was the Executive Chairman of the Kerala State Legal Services Authority, the Executive Chairman of the Lakshadweep State Legal Services Authority, the Chairman of the Law Reporting Council, I.L.R. (Kerala Series) and the President of the Rule Committee under Section 123 of the Code of Civil Procedure. He was Member of the Central Authority of the National Legal Services Authority. He was the Acting Chief Justice of the High Court of Kerala from 13.05.2016 to 1.8.2016 and from the afternoon of 16.2.2017 till he was sworn in as Chief Justice of the Chhattisgarh High Court in the forenoon of 18.3.2017.
Sri Thottathil B. Radhakrishnan was sworn-in as Chief Justice of High Court of Judicature at Hyderabad for the State of Telangana and the State of Andhra Pradesh on 7th July, 2018.