Joanna Braithwaite graduated from the Ilam School of Fine Arts at Canterbury University in 1985. She has lived and worked in Sydney since 1999, and has held many solo exhibitions in New Zealand and Australia.

Joanna has been a finalist in the Archibald and Sulman Art Awards in Australia and was runner-up in the Portia Geach Art Award in 2006.

In 2005 the Dunedin Public Art Gallery and the Christchurch Art Gallery Te Puna O Waiwhetu, exhibited a survey show of her work entitled Wonderland.

Joanna continually tests the limits of what is human, reinforcing her concerns about our relationship with the natural world. She raises questions of identity and the structures of power and authority. Significant Others, 2011 at the New Zealand Portrait Gallery was curated by Jenny Bornholdt and Gregory O'Brien. They suggest Joanna's paintings show how "art should always be a tussle."