He then joined business with family and remained active till
partition of the sub-continent. One of the major industries that Hoosenally was involved in Cotton Mills. He also remained a partner and director in over a dozen public and private listed companies and made his name in the business world. On the political front Rahimtoola was elected to the Municipal Corporation in 1918 where he remained active for many years in different capacities including being Councillor. By 1920 Hoosenally had become a member of the Bombay Legislative Council, of which he remained a permanent part till the late 1930s. His work on housing, local self-government, civic works remained a key part of his struggle and dedication. He served on several committees chief among them Sea Encroachments [1925], Black Bay Layout [1927], King George V Memorial Fund [1936–37] etc. Hoosenally's association with the Bombay Improvements Trust instilled some important works of the time. He was chairman standing committee in 1927–28 followed by chairman improvements committee 1928–29. In 1927 he was part of a board set up under the then Commissioner of Police Bombay Mr. D. Healy to look into sorting and regularizing the Hajj process for Muslims in British India. The First India Hajj Committee met in April of that year in Bombay and this was to become the initiation point of the modern national Hajj Committee's across 21st century India. During New Years dates of 1928–29 Hoosenally was representative of Bombay Presidency at the All India Muslim Conference held at Delhi. This conference was held under the presidency of His Highness the Aga Khan and had representation from all localities of India. By 1931 Hoosenally was appointed trustee of the Bombay Port Trust. He was representative of the Mill Owners Association and the Municipal Corporation simultaneously. He retained this position till end of that particular decade. On the literary front Hoosenally Rahimtoola co-edited a book with Clifford Manshaw titled
Bombay Municipality at Work in 1935. During April 1934 Hoosenally Rahimtoola was elected Mayor of Bombay. He served the corporation as mayor for one year. The elevation to mayoralty marked a key phase of his municipal career with which he was associated for a long time. During 1935 Hoosenally Rahimtoola was part of the Provincial Delimitation committee set up by the Government to establish operational and financial procedures for provincial autonomy including separation of Sindh as a separate entity. By 1936 Rahimtoola reached the zenith of his work with the legislative council as well. He was elected president of the council – a term which he served for nearly a year till early 1937. This period also marked the completion of three decades of association for him with the provincial Legislature. The provincial elections of 1937 provided an altogether different platform for Hoosenally to continue legislative work. He was inducted as minister local self government for a brief period in the 'Cooper Cabinet' formed in Bombay under the governorship of Lord Brabourne. Indias Who's Who List of 1937–38 included Hoosenally Rahimtoola for his successive posting at important posts both politically and in trade. == Family ==