Then he pursued further education at the London School of Economics in Public Finance, political theory and organization, constitutional law and international law. At the Bar Examinations held by the Council of Legal Education in England, he came first class first in Hindu and Mohameddan laws.
In 1941 he was called to the Bar. He began his career as an Advocate of the Allahabad High Court in 1942. In 1971 he was appointed as the Chief Justice of Himachal Pradesh . In January 1968 he became the first Muslim Chief Justice of India.
He became the acting President of India in 1969 after President Varahagiri Venkata Giri. He was the second Muslim to hold the post after Zakir Hussain. He served as the Vice-President of India from August 1979 to August 1984. In Jodhpur a national law university has been set up in his name.