Ms Greenwood is chair of both Westpac New Zealand Limited and The a2 Milk Company Limited. She was previously a director of Vulcan Steel and Spark New Zealand and served as a member of the New Zealand Takeovers Panel from 2007 to 2011. Pip was a partner at Russell McVeagh between 2001 and 2019 and served as the firm's board chair. She is member of Risk Committee and People Committee.