As with MRCF, Winsome is a trustee director of Uniseed and the Trans Tasman Commercialisation Fund as a nominee of AustralianSuper. Winsome has previously been a director of Colonial First State Private Capital Limited, State Superannuation Financial Services and the Financial Industry Complaints Scheme. Winsome is an active member of ASFA and was a previous Best Practice Advisor. Her background includes work as a Director in the Department of the Prime Minister and Cabinet and as ACT Branch Secretary of the Community and Public Sector Union.