She is Chair of the Universities Superannuation Scheme and also chairs the Jersey Fiscal Policy Panel.
Barker was an external member of the Bank of England’s Monetary Policy Committee for three terms between 2001-2010. During that time, Barker was commissioned by the government to conduct a major independent policy review of UK Housing Supply, and subsequently a review of Land Use Planning.
Barker was Chief Economic Adviser at the CBI between 1994-2001. She was an NED at Taylor Wimpey 2011-2020, and she was also a Commissioner of the National Infrastructure Commission between 2017-2020. In 2014 she was made a Dame for services to the economy.