Simon is a member of the Brown Advisory International Advisory Board. He was formerly managing director and president of Goldman Sachs Europe Ltd, chairman of Dresdner Kleinwort Benson, non-executive director of Berry Brothers & Rudd, non-executive director of The Economist Newspaper Ltd, chairman of Rolls-Royce Holdings plc and deputy chairman of HSBC Holdings. He is a member of the Supervisory Board of LOV Group Invest and the Panel on Takeovers and Mergers. In 2005 he started his own company, Simon Robertson Associates LLP, offering independent and trusted corporate finance advice to a limited number of major international companies. He is a non-executive director of Troy Asset Management, Evercore Inc., Byhiras Group and Immodulon Therapeutics. He is a trustee of the Royal Opera House Endowment Fund, an ambassador of the Winston Churchill Memorial Trust and president of the Légion d’Honneur UK Chapter Limited. He is a visiting professor at King’s College London (Department of Political Economy).