Mark has been involved in the private equity industry for over 35 years, working as an investor and adviser. At Time Partners, he specialises in advising institutions and families in areas of strategy, overall purpose, corporate structure, private capital and long term investing.

Mark’s early career at the Northern Trust Bank in Chicago saw him co-found the interest rate swap business in America; later advising on corporate restructurings, M&A and equity capital markets. In 1992, Mark was the co-founder and CEO of the merchant banking group, Maizels Westerberg, which was ranked the number one M&A firm in Europe (1998, 1999) amongst independent firms.  Maizels Westerberg advised private equity groups including EQT and IK.

Mark joined the European private equity firm, Doughty Hanson, in 2001. He was on the board of a number of portfolio companies, chairing their largest investment, LM Glasfiber – the leading designer and manufacturer of wind turbine blades in the world. He led the expansion of the wind components business to 20% world market share.  At Doughty Hanson, Mark was also involved in investing in and developing portfolio companies including The Priory, RHM and Tumi.

Mark co-founded and chaired The Centre for Social Justice, a UK think-tank leading new research for routes out of poverty, including leading the early work behind the Modern-Day Slavery Act. He also co-founded B Labs (UK), promoting B Corps as a standard for good business practices, and was its first UK Chairman. Mark co-founded the private equity firm 8Miles alongside Bob Geldof and Kofi Annan, an African private equity fund focused on growing businesses in underserved communities across Africa.

Mark was a member of the Prime Minister’s G8 Social Impact Investment Task Force, working with Sir Ronnie Cohen in the development of the impact investing industry. He was later appointed as Governor for England at the BBC, where he led a new approach to purpose-led reporting and was Chair of the BBC Service Review for England. He was appointed by the Government to co-lead a review of the Big Lottery Fund in 2013. He joined the board of the UK Home Office in 2018.

Mark is the author of the External Rate of Return, a method of reporting all external impacts from business. The ERR metric recommendations were published in cooperation with the London School of Economics and King’s College, London. He is Visiting Senior Fellow at the London School of Economics, Visiting Professor at the Policy Institute, King’s College, London, and a Distinguished Fellow at INSEAD, lecturing on private capital markets and impact investing.