Current Residents

Second Year Residents

John Bossalini, DO, is from Albany, New York, and received his bachelor's degree in biology from the University at Albany. He attended medical school at the Lake Erie College of Osteopathic Medicine in Erie, Pennsylvania. He completed a Transitional Year Internship at Brooke Army Medical Center in Fort Sam Houston, Texas. After the internship, he spent four years serving as a Flight Surgeon in the U.S. Air Force at Beale Air Force Base in Beale, California. After separating from the military, he worked as the medical director for an occupational medicine clinic in Newport News, Virginia, for 10 months while applying to residency programs in occupational medicine. He is currently pursuing his Master of Public Health at UC Berkeley as part of his first year in the UCSF Occupational and Environmental Medicine Residency program. He has an interest in aerospace medicine and private practice. 

 

Somayeh Fahim Nia MD, MPH was born and raised in Mashhad, Iran where she began her medical journey by attending medical school. After graduating, she spent six years working as a family physician, caring for patients in both rural and urban settings, and gaining valuable clinical experience. With a growing interest in public health, Somayeh moved to the U.S. and earned an MPH from Mount Sinai in New York, graduating in 2017. She remained in the New York area, taking on various research roles, including a position with the NIDDK at the NIH. Her passion for patient care led her to pursue further training, and she completed a three-year Internal Medicine residency at St. Barnabas Hospital in Bronx, NY, graduating in June 2024. Soon after, she began her Occupational and Environmental Medicine residency at UCSF, where she is advancing her skills by combining her clinical experience with a strong foundation in public health. Her interests include consulting, medical legal, and clinical occupational medicine. 

First Year Residents

Rosemarie Dizon DO, is from Great Mills, Maryland, and received her undergraduate degree in Public Health from Rutgers University - New Brunswick in New Jersey. She attended medical school at Campbell University in Buies Creek, North Carolina. She completed her Family Medicine Internship at Naval Hospital Camp Pendleton in 2018 before completing Naval Aeromedical Officer Training in Pensacola, Florida. She served as a Flight Surgeon at Marine Corps Air Station Cherry Point in North Carolina from 2019 to 2021 before returning to complete her Family Residency at Naval Hospital Camp Pendleton in California. Since graduating from Family Medicine residency, Rosemarie served a second tour as a Flight Surgeon at Naval Air Station Whidbey Island and deployed with Patrol Squadron 47 before starting OEM residency at UCSF in July 2025. She is a fan of Bay Area sports teams including Bay FC, the 49ers, and the Giants. Her areas of interests include reproductive consequences of occupational hazards in aviation on female veterans as well as noise pollution and it's effects on developing children. 

 

Sophie Jin, MD is from from Baltimore, Maryland and earned their undergraduate degree in Environmental Science from University of Maryland, College Park and attended medical school at University of Maryland in Baltimore. Prior to medical school, they studied socio-environmental impacts of mosquito-borne diseases and worked in HIV outreach. Dr. Jin completed a residency in Emergency Medicine at York Hospital during the height of the COVID-19 pandemic and returned to work in Baltimore City. Dr. Jin is interested in understanding and mitigating environmental impacts on health among vulnerable populations, especially in the context of climate change.

 

Vibhuti Krishna, MD graduated from Columbia University, double major in Studio Art and Medicine, Health & Society, Vanderbilt University) completed PGY1-2 at New York Presbyterian Hospital Columbia-Cornell before transitioning to the West Coast to study Occupational, Environmental, and Climate Medicine at UCSF. Dr. Vibhuti Krishna has a background in Public Health consulting during the pandemic, and clinical experience in preventive, primary, urgent, and emergent care as well as low-resource settings. She is an avid reader, writer, runner, artist, and yoga instructor with a strong penchant for baked goods. Dr. Krishna is ultimately seeking a career involving clinical, policy, and public health / field work focused on temperature-related illnesses and marginalized populations. She is excited to take on the trails in the Bay Area and search for her top chocolate chip cookie.

 

Hector Rivera Marrero, MD is originally from Humacao, Puerto Rico, and also calls Brownsville, Texas, home. He earned his undergraduate degree in Chemistry from the University of Texas Rio Grande Valley. Before attending medical school, Dr. Rivera gained experience in the oil and gas industry, operations, and later served as an Environmental Health System Coordinator. He went on to receive his medical degree from the University of Texas Rio Grande Valley School of Medicine and completed a preliminary year in general surgery at the University of California, Davis. His professional interests lie at the intersection of clinical and corporate occupational medicine. Outside of work, he enjoys spending time with his family and cooking for them.