Since 2001 Rosamund has worked as a freelance journalist. Her second book, Whispering Wire: Tracing the Overland Telegraph Line through the Heart of Australia (Wakefield Press) is published in October 2022. Her first book, Castles, Follies and Four-Leaf Clovers: Adventures along Ireland's St Declan's Way (Allen & Unwin), was published in 2011.
Rosamund was born in Ireland and grew up in England. Having worked as an actress in Dublin, performing at Dublin's Gate Theatre and Gaiety Theatre, she also acted in the film Educating Rita with Julie Walters and Michael Caine. In London she ran Syllabub Theatre Company (1982–1989) together with writer Douglas Slater, and from 1990 to 1994 she worked as Publications Manager for England's first left-wing think-tank.
In 1995 she came to Australia to join the organising team for the Mind Body Spirit Festival Sydney, where she worked until 2001. For three and a half years she headed this small team as the General Manager. From 2000 to 2005 she was both a story contributor and presenter for the weekly alternative health program Panacea on 2SER Community Radio.