Sexton graduated with an
MBBS in 1892, making her the third woman graduate from the University of Melbourne's medical school. Since most hospitals were reluctant to hire female doctors, Sexton joined a group of women, led by
Constance Stone, who co-founded the
Queen Victoria Hospital for Women and Children in 1896. When the hospital opened in 1899, Sexton was appointed the head of surgery, a position she held until 1908. In 1899, she also joined the staff of the
Royal Women's Hospital as an honorary
gynaecological surgeon; she retired in 1910 due to health problems. Sexton collaborated with Constance Ferrier Hamilton, who was known by her married name Mrs Robert O Blackwood, and Susan Ledlie Wilson, who was also known by her married name Mrs William Smith, and Smith's daughters Lorna and Alison. In France, Crivelli's sister, Suzanne Caubet, who worked as a senior volunteer administrator of the Buffon Hospital in Paris was instrumental in aiding in the establishment, supply, and management of the hospital, which was recognised by the French government as a military hospital. Sexton was given the rank of Major within the
French Army. Later in the war, Sexton, and Mrs Blackwood, worked at
Val-de-Grâce, a military hospital in Paris where doctors mainly performed
reconstructive surgery on injured soldiers. == Later life and death ==