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Rob Rosiello

Executive Partner, Chief Operating Officer

Rob Rosiello is executive partner and chief operating officer at Flagship Pioneering. In this role, Rob is involved in all aspects of Flagship’s processes for originating and developing new companies, and he provides operational and strategic support to key companies. He also plays an important role in Flagship’s strategic planning, talent acquisition and development, and growth management initiatives.

Rob joins the firm after a long tenure at McKinsey & Company, where he was a senior partner. For more than 30 years, he advised the CEOs and boards of leading health care, technology, and consumer companies on corporate strategy, M&A, and improved business unit performance. When he was managing partner of McKinsey’s Stamford office, Rob doubled the partner base and expanded the scope of work into the health care and consumer sectors. Rob was also a member of McKinsey’s Partner and Senior Partner Review Committees, as well as the Partner Compensation and Client Risk Committees. He led the work that shifted McKinsey’s recruiting toward non-MBAs and developed innovative training for the firm’s senior partners. Rob also led significant pro bono work for Save the Children, Americares, Carnegie Corporation, and Fairfield University.

From mid-2015 through 2016, Rob was EVP and chief financial officer at Valeant Pharmaceuticals, where he led the finance, HR, and IT functions. Rob led Valeant’s financial restatement and regained timely reporting status with the SEC.

Rob currently serves on the board and executive committee of Catholic Charities of New York and the Central Selection Committee of the Morehead-Cain Foundation at the University of North Carolina. He is also on the board of Inari Agriculture. Rob was previously a member of the board of the Pew Research Center and the Fairfield County Business Council.

Rob received his B.A. in economics from the University of North Carolina, where he was a Morehead Scholar and graduated Phi Beta Kappa. He also earned an M.Sc. in economics from the London School of Economics and an M.B.A. from Harvard University.