Faculty Directors

Jonathan Cahill, MD
Assistant Professor of Neurology
Adult Neurology Residency Director

Jonathan Cahill is a board certified neurologist at the Rhode Island Hospital Multiple Sclerosis Center. He received his medical degree from Albany Medical College and completed an internship in internal medicine and residency in neurology at Rhode Island Hospital and Brown University. He completed a fellowship in neuroimmunology at the University of Massachusetts in 2011, and joined the staff at the Rhode Island Hospital Multiple Sclerosis Center that year. He is an assistant professor of neurology (clinical) at The Warren Alpert Medical School of Brown University. He is a member of the board of trustees for the Rhode Island Chapter of the National Multiple Sclerosis Society.

Alexis Kearney MD, MPH
Assistant Professor of Emergency Medicine, Clinician Educator

Alexis S. Kearney is an Assistant Professor of Emergency Medicine with an appointment in the Division of Global Emergency Medicine. She received her Masters in Public Health, with a focus on the epidemiology of microbial diseases, from Yale University in 2007. Dr. Kearney graduated from medical school at Mount Sinai School of Medicine in New York City in 2012. She then completed residency in Emergency Medicine at Brown University. She currently works clinically as an emergency medicine physician at Rhode Island Hospital, The Miriam Hospital and Newport Hospital, and serves as the faculty coordinator for emergency medicine resident electives abroad. Dr. Kearney has experience working in Sub-Saharan Africa and South East Asia for both government and non-governmental organizations focusing on a variety of topics. Most recently, she has been conducting research on trauma patients presenting to an emergency department in Rwanda, and is currently in the process of trying to understand the current state of emergency medicine in Ecuador. Overall, her interests have focused on outbreak response and control, understanding and treating trauma in low-income countries, and improving the delivery of emergency care throughout the world.

Michael Koster, MD
Assistant Professor of Pediatrics
Division of Pediatric Hospitalist Medicine

Michael Koster is a Clinical Assistant Professor of Pediatrics at Brown University. Dr. Koster received his medical degree from New York Medical College, Valhalla, NY in conjunction with the Maria Fareri Children’s Hospital, Weschester, NY. He completed pediatric internship, residency and chief residency at Schneider Children’s Hospital, New Hyde Park, NY, where he continued on as an attending in the Urgicenter. Dr. Koster completed his pediatric infectious diseases fellowship at Hasbro Children’s Hospital and has worked as a pediatric hospitalist at Landmark Hospital in Woonsocket, RI. His research interest is clinical virology including the application of rapid testing to patient management. He is very committed to education and enjoys mentoring fellows, residents, and students on research and global health projects. He has ongoing collaborations in Haiti, Rwanda, and Ukraine. His global health interests extend to pneumonia, meningitis, HIV, malnutrition, and medical education.

Elizabeth Lokich, MD
Associate Residency Program Director

Elizabeth Lokich is an Assistant Professor of Obstetrics and Gynecology in the Division of Gynecologic Oncology at the Warren Alpert Medical School of Brown University. Dr. Lokich completed medical school at The Geisel School of Medicine at Dartmouth and completed her residency in Obstetrics and Gynecology at Dartmouth Hitchcock Medical Center and her fellowship in Gynecologic Oncology and Women and Infants Hospital of Brown University. She currently serves as an Associate Residency Program Director. Dr. Lokich has previously done global health work in cervical cancer screening and treatment in Kenya and Rwanda and is currently involved in building a sustainable cervical cancer screening and treatment program and training medical students and Ob-Gyn physicians in Rwanda.

Natasha Rybak, MD
Assistant Professor of Medicine and Pediatrics
Division of Infectious Diseases
Director, RISE/TB Clinic

Natasha Rybak is a Clinical Assistant Professor in Medicine and Pediatrics. She trained in the field of Internal Medicine and Pediatrics at Rhode Island Hospital/Hasbro Children’s Hospital. She then joined the Division of Infectious Diseases in July 2016 as an attending in adult and pediatric infectious diseases at The Miriam Hospital and Rhode Island Hospital. Dr. Rybak received her medical degree from the Warren Alpert Medical School of Brown University as part of the Brown-Dartmouth medical program in 2007. She then stayed on at Warren Alpert Medical School of Brown University to complete her residency in Combined Medicine and Pediatrics in 2011 followed by Fellowship in Combined Adult and Pediatric Infectious Diseases, which she completed in 2016. Dr. Rybak’s clinical and research interests are in global health with a specific interest in tuberculosis (TB), HIV and TB, and multi-drug resistant (MDR) tuberculosis among adults and children in Eastern Europe. She helped to create the Brown University Ukraine Collaboration, a global health initiative program at Brown University to address these issues of TB, TB/HIV co-infection and MDR-TB in Ukraine. She will also serve as the Medical Director of the RISE TB Clinic.

Daria Szkwarko, DO
Clinical Assistant Professor of Family Medicine
Assistant Director for the Global Health Fellowship in Family Medicine

Daria Szkwarko is an Assistant Professor and Assistant Director for the Global Health Fellowship in Family Medicine at Brown University. She is also the Family Medicine Lead for the Academic Model Providing Access to Healthcare (AMPATH) consortium – a bilateral educational exchange program between Moi University in Kenya and several North American institutions. Her research interests are in TB prevention implementation strategies globally. Specifically, she has significant experience in implementing child contact management for TB in western Kenya, and domestically, she is the course director for a TB infection ECHO (Extension for Community Healthcare Outcomes) project in Massachusetts. She is passionate about teaching, mentorship, and intercultural communication in global health.