His Lordships was born on February 29, 1904. In 1925 he took the degree of B.A. in Natural Science Tripos and came off with flying colours in the I.C.S. Examination of 1926. On returning to India in 1927 His Lordships was first appointed Assistant collector at Sholapur and then at Nasik, Khandesh and Poona. His Lordships was transferred to the Judicial Department and acted as Assistant Judges at Poona in 1933, and thereafter was promoted as District and Sessions Judge at Sholapur. In 1935, he was appointed Secretary to the Bombay Legislative Council and Assistant Legal Remembrancer.

His Lordship acted in 1944 as Joint Secretary to the Government of Bombay, Home Department. Subsequently, he was transferred as Deputy Secretary to the Government of India, Home Department. In January 1944 he held the post of Commissioner, Central Division. On August 28,1948, he was appointed a Puisne Judge of the Bombay High Court. There is no branch of public service on whose efficiency, integrity, and calm judgment, the rights and liberty of the people so largely depend as upon the judiciary. For nearly a decade the Hon'ble Mr. Chainani has discharged his high judicial function with conspicuous ability, sobriety and impartiality. His Lordship's calm and polite behaviour on the Bench, his way of handling intricate details of cases coming before him, as his keen desire to impart perfect justice without fear or favour fully justified the expectation that he would uphold the highest and best traditions of his exalted office.