Stephen is a Founding Partner of Jermyn Street Partners.

His work is focused upon Performance Transformation in all its incarnations. He has led the transformation of hundreds of organisations across 15 different industries in the Industrial, Healthcare, and Service sectors. In addition, he has deep experience in making delivering change in both public and private sector organisations. He has personally led the creation of over $10bn in tangible value, while saving thousands of jobs, and improving service delivery for millions of citizens.

Stephen has decades of experience as an Advisor, CEO and Non-Executive Director. Originally trained as an Engineer, he was a leader of both the Operations Practice and the Healthcare Practice at McKinsey & Company.

Stephen has long served as a trustee of charities dedicated to supporting the most vulnerable in society and as an Independent Director on several corporate boards.

Dennis is a Founding Partner of Jermyn Street Partners.

His work is focused on large scale Organization Transformation projects across the Financial Services, High Tech, Telco, Defense, Health Care and Private Equity Industries.

Dennis has been a senior global leader at Oliver Wyman, EY and McKinsey and Company. Outside of his consulting career, he also served in the US Navy and at the Executive Office of the President (The White House), where he worked with the negotiating team that created the foundation for the Free Trade Area of the Americas.

Dennis is the founder and CEO of Ikon Exchange which enables institutions and custodians to sell fractionalised shares in fine art held in museums to fund preservation, education and charitable activities. Dennis also sits on the Board of Directors for the Lobkowicz Collections, one of the most important Old Master Art, Music and Architecture collections still in private family hands in the world and Itim, a specialist software provider for multi-channel retailers.