Skip to content


Rob Rosiello

Executive Partner

Rob Rosiello joined Flagship Pioneering in 2018. He focuses on building capability to help originate, manage, and grow new Flagship companies. He also works with senior leadership to drive Flagship’s strategy, institution building, and growth initiatives.

Rob joined Flagship after more than 30 years at McKinsey & Company. As a senior partner, he advised CEOs and boards of leading health care, technology, and consumer companies. Rob was also a member of McKinsey’s Senior Partner Review and Compensation Committees. He led the work that shifted McKinsey’s recruiting toward non-MBAs and developed innovative leadership 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.

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.