Rustomjee was principal of the Secondary Training College in Bombay for four years, the first woman to hold that post.[3] Rustomjee gave a lecture in 1931 on the "Abolition of Illiteracy", advocating for voluntary literacy work as a condition of college matriculation.[4] She was a member of the Adult Education Committee in Bombay in 1938,[5] inspector of girls' schools,[3] and one of the leaders of a city-wide literacy drive in 1939.[6] As a member of the committee to select textbooks for Bombay schools in 1941, she clashed with Lilavati Munshi.[7][3]
In the 1940s, Rustomjee was heard regularly on Bombay radio, speaking on education and literacy topics.[8] She also wrote articles on educational topics.[9][10][11] In 1949, she served on a committee about social service work in Bombay.[12] In the early 1960s, she was involved with the Victoria Memorial School for the Blind.[13]
In 1937, Rustomjee was Commissioner of the Girl Guides in Bombay.[14] Later in life, she was president of the Indian Federation of University Women's Associations, and served as vice president of the International Federation of University Women from 1956 to 1959. In 1957 and 1958 she toured in the United States with other leaders of the Federation.[2][15][16] In a 1958 debate on women and municipal administration, organized by the State Women's Council in Bombay, she opposed women taking over all municipal administrative roles.[17][18]
"Miss Rustomji never showed any restraint and, whatever the occasion, would just let herself go and call a spade a spade, no matter who the person she was speaking to or about," recalled her colleague D. C. Pavate, who nonetheless considered her "a good sort, very well-meaning, honest, and sincere."[3]