Keith Dionne, Ph.D.

Entrepreneur-in-Residence

Keith Dionne serves as an entrepreneur-in-residence at Third Rock focusing on drug discovery and development opportunities across our portfolio.

  • Former president and chief executive officer of Constellation Pharmaceuticals

Keith is an industry veteran with 20 years of experience leading U.S. and international biotechnology companies. Most recently, he was president and CEO of Constellation Pharmaceuticals – an oncology focused epigenetics company. Prior to joining Constellation, he served as an entrepreneur-in-residence at Third Rock Ventures. Before that, he served as CEO at Surface Logix, Inc. which was acquired by Nano Terra, Inc. Keith was the president and CEO of Alantos Pharmaceuticals, leading the company’s acquisition by Amgen for more than $300 million in 2007. Prior to joining Alantos, Keith was with Millennium Pharmaceuticals (now Takeda) where he held positions of increasing responsibility, concluding his seven-year tenure as both vice president of R&D strategy and vice president and general manager, technology business. Keith was head of implantable drug delivery research at ALZA Pharmaceuticals where he led the development of Viadur™ a 12-month treatment for prostate cancer. He was one of four original scientists at CytoTherapeutics, a cell transplantation company. Keith served as an adjunct professor in the Biomedical Department at Brown University. He received both his Ph.D. in chemical engineering and his MS in the program for technology policy from MIT.

Keith is an assistant wrestling coach at Belmont High school where his son Max wrestles at 138 lbs.

Administrative Support

Maribel Laboy
Executive Assistant 
mlaboy@thirdrockventures.com
(617) 585-2079

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

Alexandra Glucksmann, Ph.D.

Entrepreneur-in-Residence

Eric Green, 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

Kelly Moynihan, 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

Maribel Laboy

Executive Assistant

Megan Lamb

Executive Assistant

Ian Miller

Administrative Assistant

Corey O’Keeffe

Event Planner & Communications

Angelo Severino

Executive Assistant

Laura Vitale

Administrative 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