Powell was born in 1937 to Eric and Kate Powell and was educated at
Wallington County Grammar School in Sutton, South London. He graduated from
Jesus College, Cambridge with a first class degree in Economics in 1961. Powell married Jennifer Mary Catt in 1962, the couple had three daughters. Outside of Jersey, Powell served as the Chairman of the Group of International Finance Centre Supervisors (formerly the Offshore Group of Banking Supervisors) from 1981 to 2011. Powell served on the
Financial Action Task Force on combating terrorist financing and money laundering and was additionally co-leader of two Financial Action Task Force groups on money laundering and human trafficking and the abuse of corporate vehicles. Powell worked as Vice Chair of an
OECD Peer Review Group that developed international standards for
exchange of information for tax purposes. Powell died in May 2019, his funeral took place at the
Parish Church of St Helier. A tribute was paid to Powell at the OECD Global Forum on Transparency and Exchange of Information in Paris in 2019. A series of memorial lectures were planned in Jersey in tribute to Powell. The
Chief Minister of Jersey Senator
John Le Fondré, said that Powell's "contribution to Jersey's financial services industry, and to the island itself, is incalculable". The former Chief Minister of Jersey,
Frank Walker, described Powell as "... calm, considered, factual, very difficult to argue against, and very authoritative. He imbued confidence and trust". ==Economic advisor==