Sir Ian Edward Lamert Davis (born 10 March 1951) is an English businessman, best known for his role as managing director of McKinsey & Company. He succeeded Rajat Gupta on 1 July 2003. He joined McKinsey in 1979 retired in 2010, after 7 years at Bowater and currently serves as a senior partner emeritus. Davis was born in Kent, England. Prior to becoming managing director, he was office manager of McKinsey's London and UK office. He has an undergraduate degree in Philosophy, Politics and Economics from Balliol College, University of Oxford. He is a member of the board of BP. He is the brother of former Reed Elsevier chairman Crispin Davis. His twin brother is Sir Nigel Davis, a Court of Appeal judge. Davis is a Non-Executive Director at Johnson & Johnson, BP, Teach For All, Big Society Trust and Majid Al Futtaim Group. He is a Senior Adviser to Apax Partners, a Non-Executive Board Member at the UK Cabinet Office and an Advisory Director of King Abdullah Petroleum Studies and Research Centre. He is currently chairman of Rolls-Royce Holdings. Davis was knighted in the 2019 Birthday Honours for services to business. Memberships Non-executive Director of Xlinks Non-executive Director BP since 2 April 2010 Independent Non-Executive Director Johnson & Johnson Non-Executive Director Majid Al Futtaim Group Non-Executive Director Mubadala Non-Executive Director Teach For All Non-Executive Director Big Society Trust Non-Executive Member of Cabinet Office Senior Adviser to McKinsey & Company Senior Adviser to Apax Partners Advisory Director to King Abdullah Petroleum Study and Research Centre International Business Council of the World Economic Forum Conference Board, member Board of Trustees Cambridge Judge Business School, University of Cambridge, Advisory Board member City of Beijing, Advisory Board member References People from Kent Alumni of Balliol College, Oxford McKinsey & Company people 1951 births Living people Directors of BP English chief executives British corporate directors Knights Bachelor Businesspeople awarded knighthoods