Pozen is a non-executive director of Nielsen Holdings. Pozen has also served as a member of the Supervisory Board of TNC B.V. since May 1, 2010. Effective July 1, 2010,Pozen is Chairman Emeritus of MFS Investment Management. Prior to that, he was Chairman of MFS Investment Management since February 2004 and previously was Secretary of Economic Affairs for the Commonwealth of Massachusetts in 2003.Pozen was also the John Olin Visiting Professor, Harvard Law School; Vice Chairman of Fidelity Investments and President of Fidelity Management & Research and was the chairman of the SEC Advisory Committee on Improvements to Financial Reporting.He is currently a director of Medtronic, Inc. and was a director of BCE, Inc. until February 2009. He is a senior lecturer at Harvard Business School, an advisor to Grelesis, a private biotech company, a trustee of the MFS group of mutual funds and a director of the Commonwealth Fund and the Harvard Neuro-Discovery Center.