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

Entrepreneur-in-Residence

Glenn Pierce joined Third Rock Ventures in 2016, bringing more than 30 years of research and development experience working with biotechnology companies. As an entrepreneur-in-residence, Glenn focuses on research, development and translation in hematology across the portfolio.

  • Board member of Global Blood Therapeutics

Glenn retired from Biogen in 2014, where he most recently served as chief medical officer, leading the hematology, cell and gene therapies division. At Biogen, Glenn spearheaded the initiation of the Humanitarian Aid Collaboration with the World Federation of Hemophilia (WFH), and My Life Our Future, a population-wide genotyping and genomic biobank initiative. Aside from Biogen, Glenn has worked in small, large, public and private biotech/biopharma firms, including Bayer, Inspiration, Avigen, Selective Genetics and Amgen in the areas of tissue regeneration and hematology. He is the co-author of more than 150 scientific papers, has received over 15 patents and is a member of numerous medical and scientific groups, including HTRS, ISTH and ASH. He served on the medical and scientific advisory council, the board of directors and was president of the board of the National Hemophilia Foundation during a span of two decades. Glenn also served on the Blood Products Advisory Committee at the FDA and the Committee on Blood Safety and Availability at the U.S. Department of Health and Human Services. He currently serves on the WFH and WFHUSA board of directors. Glenn received an M.D. and a Ph.D. in immunology, both from Case Western Reserve University in Cleveland, and did his postgraduate training in pathology and hematology research at Washington University in St. Louis.

Glenn focuses his free time on humanitarian aid training workshops in the developing world with WFH, and enjoys wildlife photography. 

Administrative Support 

Marcia Hemphill
Office Manager – West Coast and Executive Assistant
mhemphill@thirdrockventures.com
(415) 766-3638

Associated Portfolio Companies

Partners

Alexis Borisy

Partner

Abbie Celniker, Ph.D.

Partner

Neil Exter

Partner

Kevin Gillis

Partner/Chief Financial Officer

Charles Homcy, M.D.

Partner

Sarah Larson

Partner/Chief Human Resources Officer

Mark Levin

Partner

Craig Muir

Partner/Chief Technology Officer

Cary Pfeffer, M.D.

Partner

Kevin Starr

Partner

Robert Tepper, M.D.

Partner

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

Jeffrey Tong, Ph.D.

Venture Partner

Barbara Weber, M.D.

Venture Partner

Entrepreneurs-In-Residence

Jason Coloma, Ph.D.

Entrepreneur-in-Residence

Keith Dionne, Ph.D.

Entrepreneur-in-Residence

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

Entrepreneur-in-Residence

Brian Jones, Ph.D.

Entrepreneur-in-Residence

Robert Kamen, Ph.D.

Entrepreneur-in-Residence

Leon Murphy, Ph.D.

Entrepreneur-in-Residence

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

Entrepreneur-in-Residence

Laurence Turka, M.D.

Entrepreneur-in-Residence

Domain Experts

Karina Chmielewski

Senior Director, Platform Operations

Dina Ciarimboli

General Counsel

Cynthia Clayton

Head of Communications

John Keilty

General Manager, Platform Operations

Principals and Associates

Brian Albrecht, Ph.D.

Principal

Tim Funnell, DPhil.

Principal

Claire Mazumdar, Ph.D., M.B.A.

Associate

Melissa McCracken, Ph.D.

Associate

Travis Murdoch, M.D.

Principal

Vyas Ramanan, Ph.D.

Associate

Dominique Verhelle, Ph.D., M.B.A.

Principal

Recruiting

Andrea DiMella

Recruiting Director

Tracy Nicholson

Recruiting Director

Chris Robinson

Vice President, Recruiting

Administrative

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 Vitale

Administrative Assistant

Maribel Laboy

Executive Assistant

Ian Miller

Administrative Assistant

Corey O’Keeffe

Event Planner & Communications

Angelo Severino

Executive Assistant

Tracy Williams

Executive Assistant

At Third Rock, people are our most valuable asset

Check our Careers page to learn about career opportunities within the Third Rock portfolio

Third Rock Careers