Marc, called by Fortune America's leading advisor for the new CEO, has advised and trained over 35 CEOs. Many of his clients are leaders of very large, global companies and most are high performing.

An expert in the role of the CEO, Marc focuses on the CEO-only questions of strategy and value creation, governance, and building performance. An expert in investor relations, Marc conceived and built Hercules Solutions LLC, a software platform built to support CEOs in Investor Relations, which was sold to the New York Stock Exchange in 2021.

In 2017, Shawn Tully profiled Marc’s work in a five-page article in Fortune Magazine.

Marc is a Fellow and Visiting Lecturer at the Cambridge Judge Business School at Cambridge University, where he teaches an elective course on the “Art and Science of the High Performing CEO.” Marc publishes frequently in The Harvard Business Review. His most recent article, on co-CEOs, has received wide recognition including a podcast on Freakonomics. He has also written for HBR on governance, military history, and CEO retirement.

Marc taught governance at the Wharton Spencer Stuart Director’s Institute. Marc is a co-founder and Executive Vice-Chairman of Cambridge in America, an organization that has raised over $1 billion for Cambridge. Marc conceived and created two CEO forums: the Bower Forum, McKinsey & Company’s training program for new CEOs and Prium, a leading CEO roundtable. He is a member of the Council on Foreign Relations and an Honorary Fellow at St John’s College, Cambridge.

Marc has a BA with honors in History from the University of Pennsylvania, an M. Phil. in International Relations from Cambridge University, where he was a Thouron Fellow, and an MBA from The Harvard Business School. Previously, Marc was an Associate at McKinsey & Company, where he co-authored a best-selling business book on creating growth and performance. From 1998 to 2009, he founded and built a management consulting firm with expertise in strategy and value creation. The firm was acquired by Booz & Company (now part of PwC). He lives in New York City with his wife and two daughters.