Cozzens joined Sequoia in 2012 as the Silicon Valley-based firm’s first-ever hire in the Boston area, but now is leaving to form a direct investment effort for healthcare investment bank Leerink Partners. He previously had founded and led Picis, which was acquired in 2010 by a subsidiary of UnitedHealth Group (UNH). His Sequoia portfolio companies included AirStrip Technologies, Health Catalyst, Lifecode and Natera Inc. (NTRA).

Warren Hogarth has been with the firm since 2008, working on investments for such portfolio companies as C12 Energy, Carbon3D, Comprehend,FutureAdvisor, Lifecode and SunRun (NTRA). He also is on the board of FutureAdvisor, a wealth management company that recently announced it would be acquired by BlackRock (BLK).

Tim Lee had been at Sequoia since 2009, after having spent time with both Google and McKinsey & Co. His board seats included App Annie and Shopular.

None of the three is listed as a “managing member” of Sequoia Capital in recent SEC filings.

A Sequoia spokesman declined comment.

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