Rachel Thomas and Marianne Freiberger are the editors of Plus magazine, which publishes articles from the worlds top mathematicians and science writers on topics as diverse as art, medicine, cosmology and sport. Before joining Plus in 2001, Rachel was a math consultant in Australia working for government and industry. She recently edited the Gazette of the Australian Mathematical Society and has developed and taught science writing workshops for graduate students.

She also created mathematical walking tours of London and Oxford and a virtual mathematical tour guide of the world for Maths in the City. Rachel obtained her MSc in Semigroup Theory in 1998 from the University of Western Australia. Marianne joined Plus in 2005 after completing a PhD and then a three year postdoc at Queen Mary, University of London.

As a researcher she worked in complex dynamics and held various teaching engagements. In the world of math communication she has been Editor-in-Chief of the Mathscareers website and sometimes gives presentations to mathematicians about how to communicate their work to a wider audience, and to journalists about how to deal with math in the media.