Marion H Brown is a Principal Investigator in the Dunn School, working in the area of molecular immunology. At the age of eight she moved from England to Australia, where her father, an astronomer, built a new form of stellar observatory.

Having obtained her first degree in Australia, she took research posts in England and Australia before completing a PhD at the Imperial Cancer Research Fund in London. She then came to the Dunn School on a Beit Fellowship to work in the MRC Cellular Immunology Unit with Alan Williams. With the closure of the Unit after Williams's death, she continued to work with Neil Barclay and Anton van de Merwe on cell surface proteins that are critical to interactions between cells in the immune system.

Brown has initiated and run an annual Research Techniques Days for graduate students in the Medical Sciences Division, and also organised the annual departmental symposium. She is interested the mutual engagement of science and theatre, and has produced performances of science-based theatre.