Judge Margie Victor qualified as a social worker then attorney and was then called to the Johannesburg Bar to practice as an advocate. In 2008, after spending 25 years as an advocate at the Johannesburg Bar, she was elevated to the Johannesburg High Court of South Africa Gauteng Local Division based in Johannesburg as a judge. She is a judge of the Competition Appeal Court. In 2016 she served an acting justice of the Supreme Court of Appeal. In 2019 she was appointed an Acting Justice of the Constitutional Court until 2021.

Her contributions outside of judicial work include being vice president of the South African Chapter of the International Association of Women judges. She is also involved in the WOZA Women’s Academy of Learning Project - “Women Judges making a difference.” She has done extensive work on mentoring of aspirant judges. She has mentored women legal practitioners to strengthen their skills. She has mentored final year law students from the USA as judges’ clerks as well as many South African law students. She has addressed attorneys of the Law Society of the Northern Provinces on a number of topics including aspirant judges training.  She has done skills training of lawyers at many winter workshops as run by the former Law Society of the Northern Provinces. She is also a patron to the Johannesburg Child Welfare Society. She has edited nine volumes of a Jungian poet found on

Her entire career has been focused on improving the lives of others. Her community work has included establishing a Montessori preprimary school for underprivileged children and during her 25-year career as an advocate she has assisted many abused women with legal advice. She undertook a massive environmental law case assisting a small community living in the shadows of an industrial mill. She was the first woman to be elected to the Johannesburg Bar Council and was involved in the call for gender and racial transformation in the leadership structures. She did extensive work in the late 1980’s and early 1990’s at the Johannesburg Bar doing public interest litigation such as treason trial work, defending young members of communities accused of public violence and related issues and civil work.

The Johannesburg Bar honoured her contribution to South African law as an advocate.