University of Massachusetts School of Medicine

Disaster Medicine & Emergency Management Fellowship

Dr. John Broach, Disaster 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.  Dr Broach serves on several hospital-wide disaster preparedness committees as well as being a member of the Massachusetts DMAT-MA2.  Dr Broach has been in instrumental in preparing UMass for emergening infectious diseases, such as H1N1 and Ebola.

Core faculty


Dr. Andrew Milsten, Disaster Medicine fellowship director.  Dr. Milsten received his MD from the George Washington University, 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 director for special events & Ravens stadium fan operations. He joined the UMass Emergency Medicine Residency Program and faculty in 2009 and is director of the Fellowship in 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).

Affiliated DM faculty

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




This website is produced by the Division of Disaster Medicine at the University of Massaschusetts Medical School, but it is not an official page/publication of the University of Massachusetts Worcester Campus. For more information about UMass Medical School visit

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Current Fellow

Dr. Clayton Martin, better known as Sonny to his colleagues, comes from his hometown of Bakersfield, California. Sonny attended BYU-Hawaii for a year before moving to Portugal, where he lived for 2 years doing volunteer work. After returning to BYU-Hawaii, he graduated with a degree in Biology and a minor in Biochemistry. He went to the Lewis Katz School of Medicine at Temple University and completed his Emergency Medicine Residency at the University of Massachusetts where he won the Resident Teacher of the Year Award. In July 2020, he began his Disaster Medicine and Emergency Management Fellowship. In his free time, Sonny enjoys spending time with his daughter, playing boards games, Dungeons and Dragons, and tinkering on his computers. He is passionate about Emergency Medicine, medical education, and discussing philosophy and ethics.

EMS Faculty

ems sonny