Joanna is a full-time director with extensive governance experience. Currently she is the chair of Oyster Property Group, and is on the board of Genesis Energy, Trade Me Group and Partners Life.  She is the chair of the IFRS Advisory Council (London based). Her previous governance roles included Kiwi Property Group, Primary Growth Partnership, the Co-operative Bank, Sport New Zealand and Rowing New Zealand.

Before beginning her governance career Joanna was a partner in international accountancy and consultancy firm KPMG, chair of the New Zealand Financial Reporting Standards Board and a member of the Securities Commission. Joanna was awarded the New Zealand Order of Merit for services to accounting.