Robert Tepper, M.D.


Bob Tepper is a co-founder of Third Rock Ventures and a distinguished scientist with more than 30 years of experience building and operating leading R&D organizations in the biotech industry. Bob focuses on the formation, development and scientific strategy of our portfolio companies, as well as actively identifying and evaluating new investments. He has also assumed active leadership roles in a number of our portfolio companies:

  • Board member and former interim CSO of Neon Therapeutics 
  • Board member of Allena
  • Board member and former interim CSO of Constellation Pharmaceuticals
  • Board member and former interim CSO of Jounce Therapeutics
  • Board member of Kala Pharmaceuticals
  • Former board member of Alcresta
  • Former board member of Alnara Pharmaceuticals (sold to Eli Lilly)
  • Former board member of bluebird bio

Prior to joining Third Rock, Bob was president of R&D at Millennium Pharmaceuticals and was vital in its expansion from a drug discovery company to a fully integrated biopharmaceutical company. Earlier, Bob co-founded Cell Genesys/Abgenix. Bob holds an A.B. in biochemistry from Princeton University and received his M.D. from Harvard Medical School. Bob currently serves as an adjunct faculty member at Harvard Medical School and Massachusetts General Hospital and is an advisory board member of several leading health care institutions, including the Partners HealthCare Center for Personalized Genetic Medicine, Harvard Medical School and Tufts Medical School. Bob is on the Board of Overseers at Tufts University. He also serves on the Council of the National Center for the Advancement of Translational Sciences (NCATS) at the National Institutes of Health (NIH).

Bob participated in the 1972 Olympic Games in Munich, Germany.

Administrative Support

Zoë Angell
Executive Assistant
(617) 585-2030

Associated Portfolio Companies


Alexis Borisy


Abbie Celniker, Ph.D.


Neil Exter


Kevin Gillis

Partner/Chief Financial Officer

Charles Homcy, M.D.


Sarah Larson

Partner/Chief Human Resources Officer

Mark Levin


Craig Muir

Partner/Chief Technology Officer

Cary Pfeffer, M.D.


Kevin Starr


Robert Tepper, M.D.


Venture Partners

Frank T. Gentile, Ph.D.

Venture Partner

Mark A. Goldsmith, M.D., Ph.D.

Venture Partner

Perry Karsen

Venture Partner

Christoph Lengauer, Ph.D.

Venture Partner

Philip Reilly, M.D., J.D.

Venture Partner

Stephen Sherwin, M.D.

Venture Partner

Barbara Weber, M.D.

Venture Partner


Keith Dionne


Jeffrey Finer, M.D., Ph.D.


Robert Kamen, Ph.D.


Glenn Pierce, M.D., Ph.D.


Jeffrey Tong, Ph.D.


Laurence Turka, M.D.


Domain Experts

Brian Albrecht, Ph.D.


Dina Ciarimboli

General Counsel

Cynthia Clayton

Head of Communications

Tim Funnell, DPhil.


John Keilty

General Manager, Platform Operations


Andrea DiMella

Recruiting Director

Tracy Nicholson

Recruiting Director

Chris Robinson

Vice President, Recruiting


Chelsea Place Johnson, Ph.D.

Senior Associate

Vyas Ramanan, Ph.D.



Zoe Angell

Executive Assistant

Megan Graziano

Manager of Operations and Administration

Linda Heath

Executive Assistant

Marcia Hemphill

Office Manager - West Coast and Executive Assistant

Rhea Kappa

Receptionist/Administrative Assistant

Laura Klein

Administrative Assistant

Maribel Laboy

Executive Assistant

Ian Miller

Administrative Assistant

Corey O’Keeffe

Event Planner & Communications

Tracy Williams

Executive Assistant

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