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Meet Our Team


Dr. John Broach, Disaster Medicine Division Director

Dr. Broach attended undergraduate and medical school, as well as receiving his MPH from Northwestern University in Chicago before his emergency medicine residency training at the University of Massachusetts. Dr. Broach completed the UMaSs DM fellowship. He serves on several hospital-wide disaster preparedness committees, as well as being a member of the Massachusetts DMAT-MA2. Dr. Broach has been instrumental in preparing UMass for emerging infectious diseases such as H1N1 and Ebola.

Dr. Andrew Milsten, Disaster Medicine Fellowship Director

Dr. Milsten received his MD from George Washington University and completed his residency in Emergency Medicine at the Lincoln Medical Center in New York City. He completed an EMS Fellowship in addition to a MAsters of Science in Emergency Health Services at the University of Maryland. He has been active as a clinician and researcher since 2000 at the University of Maryland School of Medicine and at Baltimore Washington Medical Center. His research has primarily focused on mass gathering medicine while he was the director for special events & Ravens stadium fan operations. He joined the UMass Emergency Medicine Program and faculty in 2009  and is the fellowship director of Disaster Medicine and Emergency MAnagement. Dr. Milsten coordinates and runs the NDLSF training programs at UMass, specifically BDLS and ADLS. He was also instrumental in organizing and founding the New England Society of Disaster Medicine (NESDM).


Clare Charbonnet, MD

Dr. Charbonnet studied civil engineering at the University of Notre Dame. After two years of information technology consulting, she volunteered with an international disaster response organization. She served as demolition team leader on earthquake remediation projects in both Indonesia and Haiti. While in Haiti, Clare discovered a passion for medicine.

While in medical school at Northwestern University, Clare conducted research on the biopsychosocial factors that affect HIV transmission among the LGBTQ community. She joined the emergency medicine residency at MetroHealth Medical Center and the Cleveland Clinic Foundation. In residency, Clare established an EMS subspecialty track and developed the training curriculum for online medical command. She is excited to start her two-year Disaster Medicine fellowship in July 2023.



Kevin Chason, DO
Assistant Professror, Emergency Medicine, The Mount Sinai Hospital, NYC

Richard T. Ellison III, MD,
Professor of Medicine, Molecular Genetics and Microbiology
Associate Director, Division of Infectious Diseases and Immunology
Hospital Epidemiologist
Deputy Editor, Journal Watch for Infectious Diseases
President, Massachusetts Infectious Disease Society
Clinical interests: infection control, mass immunization

Romolo J. Gaspari, MD, MSc, RDMS
Executive Vice Chairman in the Department of Emergency Medicine
Senior Member of the Division of Emergency Ultrasound
Professor, Emergency Medicine
Clinical Interests: Ultrasound, research

Jeff Grange, MD
Associate Professor of Emergency Medicine
Loma Linda University Medical Center
President & CEO, Symons Ambulance
Medical director, San Bernardino Sheriff's Air Rescue

Christina H. Hernon, MD
Board Certified EM; Board Eligible Toxicology
Clinical interests: toxicology, radiation exposure
Dr. Hernon is frequently involved in the training of resident physicians, emergency nurses, paramedics/EMTs and medical students.  She has had over fifteen years experience working in Emergency Medical Services, has worked as a flight physician for UMassMemorial LifeFlight, and has publications in topics of toxicology and radiation exposure.

Michael Hirsh, M.D., F.A.C.S., F.A.A.P.
Professor, Surgery and Pediatrics
Chief, Pediatric Surgery and Trauma
Associate Surgical Director of the Trauma Center and Pediatric Intensive Care Unit
Co-Director, Injury Free Worcester, Injury Free Coalition for Kids of Worcester
Board Certified: General Surgery, Pediatric Surgery and Critical Care
2006 Worcester District Medical Society and Massachusetts Medical Society Clinician of the Year Award

Michael J. Hunter EMT-P
Deputy Chief of EMS for Worcester EMS at UMass Memorial Health Care (UMMHC)
Mr. Hunter has served on the Massachusetts Committee of Trauma’s Trauma Registry Sub-Committee and is an active member of the UMMHC Emergency Medicine/Trauma Committee. Member of NAEMT and has been active in PHTLS since the late 1980s. In addition to his involvement on the PHTLS Executive Council, he is the Massachusetts PHTLS State Coordinator and an active member of the PHTLS International Faculty

Hillary Irons, MD
Assistant Professor of Emergency Medicine
Dr. Hillary Irons is a graduate of Medical College of Georgia School of Medicine. She completed her residency at Sparrow Hospital and Health System and her Fellowship at Mass General Hospital.

Debra Heitmann, MD, FACEP
Associate Professor, Department of Emergency Medicine

Michael Kelleher, EMTP
Deputy Fire Chief  
Foxborough Fire & Rescue
Deputy Chief Kelleher has been a member of Foxborough Fire & Rescue for 20 years and is currently assigned as Deputy Chief of Operations which oversees major event planning and logistics for Gillette Stadium. Deputy Chief Kelleher serves on The Massachusetts State Hazardous Materials Team as The Team Coordinator for Hazmat District 1 which covers 91 Cities and Towns in Southeastern Massachusetts including the Cape and Islands. Outside of the Fire Service Deputy Kelleher has served in the role of Hospital Safety Officer and Emergency Management Coordinator in various hospitals in and around Metro-Boston.

Ira Nemeth, M.D., FACEP, FAEMS
Associate medical director of UMass EMS and Lifeflight at Umass Memorial Medical Center in Worcester Massachusetts.  Dr. Nemeth has had a varied career that has included being the Medical Director of Preparedness for Dallas County Public Health in Dallas, Texas and establishing the EMS fellowship at Baylor College of Medicine in Houston Texas.  Dr. Nemeth is currently the chair of the Disaster Preparedness and Response Committee for the American College of Emergency Physicians, a member of Institute of Medicine Preparedness Forum, and a member of the Scientific Advisory Council for the American Red Cross.  He also is on the Board of Directors for the National Disaster Life Support Foundation and is co-editor of the upcoming revision of the National Disaster Life Support textbook.  Dr. Nemeth earned his undergraduate degree in biomedical engineering from Tulane University and his MD from George Washington University School of Medicine.  He did his residency in emergency medicine at Maimonides Medical Center in Brooklyn, New York and his fellowship in governmental emergency medical security services with Dr. Paul Pepe at Parkland Hospital in Dallas, Texas.

Joseph Sabato, MD
Assistant Professor of Emergency Medicine

Carl H. Schultz, MD, FACEP
Professor of Emergency Medicine and Public Health
Director of Research, Center for Disaster Medical Sciences
Director, EMS and Disaster Medical Sciences Fellowship
UC Irvine School of Medicine

Stacy N Weisberg, MD, MPH, FACEP
Associate Medical Director, Worcester EMS & Life Flight
Director, EMS/Disaster Fellowship
Associate Professor, Emergency Medicine
Physician member of MA-2 DMAT team.
Dr Weisberg has authored several chapters on disaster medicine topics in an emergency medicine textbook:
Aghababian, R. V. (2006). Essentials of Emergency Medicine. Sudbury, MA: Jones and Bartlett Publishers.
Clinical Interests: Emergency Medical Service, Disaster Medicine