Core Faculty
Joshua Baugh, MD, MPP, MHCM
Director, Mass General Brigham Emergency Medicine Fellowship in Leadership and Administration
Vice Chair for Clinical Affairs, Emergency Medicine, Mass General Brigham
Assistant Professor, Harvard Medical School
MGB Fellowship completed in 2021
DaMarcus Baymon, MD
Senior Clinical Director, Department of Emergency Medicine, Brigham and Women’s Hospital
Assistant Professor, Harvard Medical School
Ali Raja, MD, MBA, MPH
Executive Vice Chair, Department of Emergency Medicine, Mass General Brigham
Professor, Harvard Medical School
Lauren Nentwich, MD
Associate Chief Medical Officer
Massachusetts General Hospital
Assistant Professor
Harvard Medical School
Paul Chen, MD, MBA
Associate Chief Medical Officer
Vice President of Medical Affairs
Brigham and Women’s Hospital
Assistant Professor, Harvard Medical School
Jonathan Sonis, MD, MHCM
Associate Chief Medical Officer
Vice President of Medical Affairs
Newton-Wellesley Hospital
Assistant Professor, Harvard Medical School
MGB Fellowship completed 2019
Dana IM, MD, MPP
Vice Chair of Quality
Assistant Chief Medical Officer
Department of Emergency Medicine
Mass General Brigham
Charlotte Croteau, MD, MHCM
Associate Director, Mass General Brigham Emergency Medicine Fellowship in Leadership and Administration
Director of Clinical Operations, Department of Emergency Medicine, Massachusetts General Hospital
Instructor, Harvard Medical School
MGB Fellowship completed 2025
Johnothan Smileye, MD, MHCM
Associate Director, Mass General Brigham Emergency Medicine Fellowship in Leadership and Administration
Associate Director of Clinical Operations, Director of ED Observation, Department of Emergency Medicine, Brigham and Women’s Hospital
Instructor, Harvard Medical School
MGB Fellowship completed 2026
Senior Advisors
Ron M. Walls, MD
Chief Operating Officer, Mass General Brigham
Neskey Family Professor of Emergency Medicine,
Harvard Medical School
Michael VanRooyen, MD, MPH
Chief, Mass General Brigham Enterprise Emergency Medicine
Chair, Department of Emergency Medicine,
Brigham and Women’s Hospital
Chair, Department of Emergency Medicine,
Massachusetts General Hospital
J. Stephen Bohan Professor of Emergency Medicine,
Harvard Medical School
Lavine Family Professor of Humanitarian Studies,
Harvard T. H. Chan School of Public Health
Director, The Harvard Humanitarian Initiative
David F. M. Brown, MD
President of Academic Medical Centers, Mass General Brigham
Mass General Trustees Professor of Emergency Medicine,
Harvard Medical School