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Surgical Residency for Physician Assistants Faculty


The faculty for the Postgraduate Physician Surgical Residency for Physician Assistants includes the core faculty of the Intern and Resident Lectures.


Jonathan Efron, M.D.

The William Stewart Halstead Professor
Interim Chair, Department of Surgery


Dr. Jonathan Edward Efron is an associate professor of urology and surgery at the Johns Hopkins School of Medicine. He is the recipient of The Mark M. Ravitch, M.D. Endowed Professorship in Gastrointestinal Surgery and serves as the Interim Chair of the Department of Surgery and the Chief of the Ravitch Division at Johns Hopkins.

Dr. Efron is colon and rectal surgeon whose clincial focus includes colon and rectal cancer, inflammatory bowel disease, fecal incontinence and anorectal disorders. He is an expert in minimally invasive and robotic procedures and colostomy-sparing procedures, such as ileal pouch anal anastomis. He also has a particular interest in the managment of recurrent rectal cancer.

Dr. Efron received his B.A. from Franklin and Marshall College and completed his medical degree at the University of Maryland in 1993. He then conducted a residency in general surgery at North Shore University Hospital in Manhasset, NY and a fellowship in colorectal surgery at the Cleveland Clinic of Florida. 

Albert Chi, M.D. Assistant Professor of Trauma Surgery

Albert Chi, M.D. Assistant Professor of Trauma Surgery

Dr. Chi is the medical director for the Physician Assistant Residency Program.  He attended medical school at the University of Arizona College of Medicine and graduated in 2003.  He did his General Surgery residency at the University of Arizona College of Medicine in 2008 and completed his surgical critical care fellowship at the R Adams Cowley Shock Trauma Center from 2008-2010. Dr. Chi is a trauma surgeon whose practice includes critcal care, trauma, and acute care surgery. 

Dr. Chi also has background in biomedical engineering and a research emphasis in motor control. He currently works in collaboration with the Johns Hopkins Applied Physics Labs, investigating innovative control strategies for advanced prosthetics, particularly in patients with upper extremity amputations who have undergone targeted muscle reinnervation. Dr. Chi is also developing human computer interface technologies for patients with spinal cord injuries utilizing only eye control of environmental and robotic devices.

In addition to his clinical interest in trauma and critcal care, he also actively participates in 
 medical missions to Haiti, using his expertise to help underserved areas.

Jennie McKown

Jennie McKown, MSHS, PA-C

Jennie McKown, MSHS, PA-C is Program Director of the Physician Assistant Surgical Residency and is a Physician Assistant at The Johns Hopkins Hospital in the Department of Surgery. Jennie obtained her undergraduate degree in Fitness and Cardiac Rehab/Exercise Science from Ithaca College in 1996. In 2001, she earned a Master of Science in Health Science from The George Washington University Physician Assistant Program. Following her PA program, Jennie worked in South Texas in a family practice setting. She went on to become a member of the third class of the JHH Postgraduate Surgical Residency for Physician Assistants in 2007.

Ms. McKown currently is a valued member of the Vascular Surgery team in the Department of Surgery. She has been an active member of the PA residency since completing the program, and has been the Director of the Postgraduate Surgical PA Residency Program since 2008. She is past president of the Association of Postgraduate PA Programs and is dedicated to continuing to develop both the PA surgical residency program and the PA residents who come through the program.  

martha kennedy

Martha Kennedy, Ph.D., RN, ACNP

Martha Kennedy has been Education Coordinator for the Post-graduate Surgical PA Residency program since 2006. She is a Nurse Practitioner in Surgical Intensive Care at JHH, where she cares for acute and critically ill surgical patients. Martha also serves as the Co-Director for the Post-graduate Critical Care Physician Assistant Residency Program.

Martha worked in Medical Oncology for over 18 years before joining the Department of Surgery as a Nurse Practitioner in 2002. She obtained her Bachelors in Nursing from Georgetown University in 1984, as well as a Masters in Nursing (1996) and Ph.D in Nursing (2000) from University of Maryland, Baltimore. Her research interests have been in the use of pulmonary physiologic parameters for prediction of time on ventilators, sepsis management in the ICU, the role and education of nurse practitioners and physician assistants in surgical and critical care, and measures of ICU workload and cognitive burden.


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