Ghosh joined the
Department of the Environment in 1979 as an administration trainee. In July 1995 she joined the
Cabinet Office on loan, as deputy director of the Efficiency Unit. She left the post in May 1997 to become director of the London East and European Programmes at the
Government Office for London. and, in 2003, became director general for Corporate Services at
HM Revenue & Customs (HMRC), where she played an important part in the transformation programme merging the
Inland Revenue and
Customs & Excise to form the new department. She was appointed permanent secretary at the
Department for Environment, Food and Rural Affairs (Defra) in November 2005. She replaced
David Normington as permanent secretary at the
Home Office in January 2011. In November 2012, she stepped down from her role at the Home Office to become director general at the
National Trust. In April 2018, Ghosh left that role to become
Master of Balliol College, Oxford, succeeding
Drummond Bone. ==Handling of harassment complaint==