As of 2022[update] she is professorial research fellow at the Victorian College of the Arts.
Originally trained as a sculptor in the 1970s, Marsh first was involved with sculpture performances[1] often identified with the emerging feminist art movement in Australia,[2] and was a member of the Women's Art Movement.
[3] She also belonged to the group of women artists who worked upon the Lip magazine.
[2] Marsh is well known as a feminist art theorist and has published many essays, journal articles, exhibition catalogues and reviews in Australia and internationally.
Monograph publications include a survey of performance art in Australia Body and Self: Performance Art in Australia, 1969–1992[2] and photography and modernism from the nineteenth century onwards – The Darkroom: Photography and the Theatre of Desire[4][5] She has also received Australian Research Council (ARC) Discovery grants as sole researcher and as part of a team around the areas of photography, video and performance.