Bill Berry

Dr. William Berry, Ariadne Labs Chief Medical Officer
Chief Medical Officer and Director, Safe Surgery Program

Bill Berry, MD, MPA, MPH, is chief medical officer at Ariadne Labs. In this role, Bill oversees the growth and development for all the research work including the Program teams: Safe Surgery, BetterBirth, and Serious Illness Care as well as the Platform teams: Informatics and Measurement, Implementation and Improvement Science, and Program Management. In addition, Bill serves as the Director of the Safe Surgery Program and oversees the specific research and execution of the program.

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Susan Block

Director, Serious Illness Care Program

As director, Susan Block, MD oversees the research and execution of the Serious Illness Care Program. In addition, Susan is the founding chair of the Department of Psychosocial Oncology and Palliative Care at Dana-Farber Cancer Institute and Brigham and Women’s Hospital, Co-Director of the Harvard Medical School Center for Palliative Care, and professor of psychiatry and medicine at Harvard Medical School.

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Catherine Breen

Chief Operating Officer

Catherine Breen is the chief operating officer for Ariadne Labs and has full supervisory responsibility for development and execution of financial management strategy, including policy, budgeting, compliance, and revenue and partnership generation, as well as for procurement and facilities maintenance, acquisition and retention of talent, administrative policies, and parent institution and other external relationships. Her role focuses on strengthening and supporting Ariadne Labs’ programs and platforms creatively and collaboratively in order to achieve programmatic, operational, and financial goals in a manner that advances the organization’s mission, vision, and values.

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Atul Gawande

Executive Director

Atul Gawande, MD, MPH, is Executive Director of Ariadne Labs. He is also a surgeon, professor, writer, and public health researcher. He practices general and endocrine surgery at Brigham and Women’s Hospital, is professor in the Department of Health Policy and Management at the Harvard T. H. Chan School of Public Health, and Samuel O. Thier Professor of Surgery at Harvard Medical School. Atul is also Chairman of Lifebox, a nonprofit reducing surgical deaths globally.

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Louise Knabe

Knabe, Louise
Chief Project Officer

Louise Knabe, M. Engineering, is the Chief Project Officer. In this role, she leads the team of project managers who partner with scientific leaders to ensure the successful delivery of all scientific projects at Ariadne Labs. She partners with the Chief Medical Officer to set the strategy for and lead the scientific research and implementation work.

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Amy Lieb

Director of Project Management

Amy Lieb, MBA, is the Director of Project Management, and in close collaboration with the Chief Project Officer, leads Ariadne Labs’ team of Project Managers to ensure the successful delivery of all scientific projects at Ariadne Labs. She applies her strategy and operations expertise cooperatively across the organization to support Ariadne Lab’s program growth and strategy, Ariadne Labs’ Way of Project Management, and development of Ariadne Labs’s Project Management talent pool.

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Megan McLean


Chief of Staff and Director of External Relations

Megan McLean, JD, MBA, is Chief of Staff and Director of External Relations. In these roles, she supports the Executive Director in overseeing the growth and development of Ariadne Labs and providing strategic direction to the organization, and oversees media management and public affairs.

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Kit Nichols

Director of Talent Development

Kit Nichols is Director of Talent Development, guiding our strategy and processes for recruiting and retaining faculty and staff of the highest caliber.

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Katherine Semrau

Dr. Katherine Semrau. director of the BetterBirth Program
Director, BetterBirth Program

Katherine Semrau, PhD, MPH, is director of the BetterBirth Program at Ariadne Labs. As Program Director, Dr. Semrau oversees the research and execution of the BetterBirth Program.

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Athelia Tilson

Director of Development

Athelia Tilson is the director of development for Ariadne Labs. With a diverse background in fundraising from MIT, Boston Children’s Hospital and Pathfinder International, Athelia has deep experience building successful fundraising programs to raise large gifts for higher education, healthcare and global health organizations. Here at Ariadne Labs, she works closely with the Executive Director, senior leadership, faculty, and colleagues at Brigham Women’s Hospital and the Harvard T.H. Chan School of Public Health to connect philanthropic individuals and institutions to Ariadne Labs’ ideas, innovators and innovations.

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