Hastings spent 12 years at the BBC, joining as a journalist and broadcaster. He became the corporation's head of public affairs in 1996, before becoming head of CSR in 2003. He exits on 19 May.
He has also worked for the Commission for Racial Equality and is the current chairman of Crime Concern.
For the past two years, KPMG – which has a reputation for working with big governments and wealthy multinationals – has published a global CSR report.
Last year, KPMG UK was one of a group of firms that donated £3.5m for a start-up charity providing grants to young overseas volunteers.
KPMG International CEO Mike Wareing is joint chairman of Engage, which promotes staff volunteering.