After graduating from Harvard Business School, Clementi commenced a career in the finance industry. He spent 22 years at investment bank
Kleinwort Benson. In 1994, Clementi and
Nicholas Redmayne were appointed as joint chief executives of investment banking. His nickname at Kleinwort Benson was "The Duke". Clementi was
Deputy Governor of the Bank of England from 1997 to 2002. In December 2002, he became chairman of
Prudential plc until December 2008. He was chairman of
Virgin Money from October 2011 until May 2015. From February 2017 to February 2021, he was
Chairman of the BBC. He held a number of other board positions. He was a non-executive director of
Rio Tinto Group from 2003 to 2010; a Non-Executive Director of
Foreign & Colonial Investment Trust from 2008 to 2012; vice-chairman at investment managers, Ruffer LLP from 2011 to 2017; chairman of international payments business World First from 2011 to 2018 and chairman of
King's Cross Central, responsible for the regeneration of the King's Cross Estate, from 2008 to 2024. Among non-business interests, he was on the board of
The Royal Opera House from 2006 to 2014, Warden (chairman of the governing body) of
Winchester College from 2008 to 2014, Master of the
Mercers' Company 2010 to 2011, and a trustee of
The Royal Society of Medicine from 2010 to 2016. He wrote two reports for
HM Government. In July 2003, he was given the task, by the
Secretary of State for Constitutional Affairs,
Lord Falconer of Thoroton, of undertaking a wide-ranging
independent review of the regulation of
legal services in England and Wales, published in December 2004 and known generally as the Clementi report. In September 2015, he was asked by the Secretary of State for the
Department for Culture, Media and Sport (DCMS) to write a report on the governance of the BBC, published in March 2016 entitled "A Review of the Governance and Regulation of the BBC". In 2004, Clementi was appointed Knight Bachelor. == Personal life ==