A chartered accountant by background, he has been a Director of Ludgate Investments Limited since 2004. He is Honorary Treasurer of the Friends of the National Libraries and The Walpole Society, amongst other charities. He was formerly a Trustee of the Samuel Courtauld Trust (1992-2007) and of the Art Fund (2000-11). He is joint author of ‘The British as Art Collectors: From the Tudors to the Present’ (2012) and author of ‘A Dynasty of Dealers: John Smith and Successors 1801-1924’ (2013).
A former partner and European Chairman of Advent International, a global private equity firm, where he worked between 1993 and 2013. Previously he had consulting and board roles at McKinsey & Co Inc and Central Sheerwood Plc amongst others. He is Chairman of the City of London Sinfonia and chairs the Board of the New College of Humanities. He teaches at INSEAD where he is also President of the UK Council, and is an Honorary Fellow of Trinity College Oxford.
Trustees of the National Gallery devote approximately two days per month to the role, and are unpaid. Charles Sebag-Montefiore and John Singer hold no other public appointments. Mr Sebag-Montefiore has declared no political activity in the United Kingdom in the last 5 years and Mr Singer has declared recordable donations to the Conservative Party.