Greig completed her Bachelor of Arts degree in 1900, and on 28 March 1903, graduated with her Bachelor of Laws degree, the first woman in Victoria to do so, and only the second in the country, after Ada Evans who graduated the previous year from the University of Sydney. Greig received third-class honours for her degree, placing her second in her year level. The rules of practice in force at the time did not comprehend female lawyers, and there was no precedent of women becoming lawyers, in any of the Australian states. Evans had been denied admission to the New South Wales Bar after she graduated on the basis of her sex, forcing her to campaign for the rules of practice legislation to be changed to specifically allow women. Greig and her supporters had already conducted a campaign in Victoria, and in April 1903 the Parliament of Victoria passed the Women's Disabilities Removal Act 1903, nicknamed the "Flos Greig Enabling Act", to specifically allow women to practise. Greig completed her articles of clerkship, and on 1 August 1905 was admitted to the Victorian Bar, becoming the first woman admitted to legal practice in Australia. A short time later, she was the first woman admitted to the Law Institute of Victoria. She commenced work as a self-employed solicitor in Melbourne. One of her first jobs was for the Women's Christian Temperance Union, drafting their proposed amendments to the Children's Court Act 1906, the legislation which established the Children's Court of Victoria. Greig later worked as an employee of Cornwall Stodart, a firm of solicitors in Melbourne. In about 1930, Greig moved to the town of Wangaratta in north-east Victoria, where she worked in a firm of solicitors led by Paul McSwiney. During this time she toured the countryside around Wangaratta promoting adult and tertiary education. Greig retired in 1942, and moved to Rosebud on the Mornington Peninsula. Greig lived in Rosebud until her death in 1958 in Moorabbin, aged 78.
Family
Greig had four sisters and three brothers. While two of her brothers followed her father into the family textile business, the women of the family blazed their own trails. Sisters Jane and Janet were two of the first women to study medicine in Australia, at the University of Melbourne, Jane a pioneer in public health and Janet the first anaesthetist in Victoria. Another sister, Clara, founded a coaching school for university students. The youngest sister, Stella, followed Flos into law, graduating from the University of Melbourne with a Bachelor of Laws degree on 8 April 1911. Stella died of tuberculosis less than two years later, aged 24.
