He was the chief justice of Orissa high court. With his elevation, the no. of the apex court judges has gone up to 29.
The apex court has a sectioned strength of 31 judges.
Justice Roy will have a tenure of three years.
Article 124 of Constitution of India says that the judge of SC shall be appointed by the President.
Any citizen of India who has been a judge of one high court or more, for at least five years or an advocate there, for at least ten years, or a distinguished jurist, in the opinion of the president, is eligible to be appointed as a judge of the Supreme Court.