New Senior Faculty and Program Leaders

Katelin Blackburn, MD, MPH
LEAD track Director, Associate Program Director
Boston Medical Center

Katelin Blackburn (she/her) is an adolescent medicine physician at Boston Medical Center, and the LEAD Track Director of the BCRP, focused on supporting the professional development of the LEAD resident community, in addition to co-leading iteration of the Advocacy Rotation. Katelin grew up in Buffalo, NY before attending Boston University for undergraduate studies, and Boston University School of Medicine for medical school. She was in the LEAD Track of the Boston Combined Residency Program, and completed adolescent fellowship at Boston Children’s Hospital. When not at work, you can find Katelin walking her dog, attending concerts, and volunteering with Respond, an anti-domestic violence organization.

Mark Castera, MD
Associate Program Director
Boston Medical Center

Mark Castera is a neonatologist at Boston Medical Center and an Associate Program Director of the BCRP, focused on resident coaching and simulation-based education. Mark grew up in Leawood, KS before attending the University of Notre Dame and Creighton University School of Medicine. He was a resident at Seattle Children’s Hospital and completed fellowship in Neonatal-Perinatal Medicine at the Children’s Hospital of Philadelphia. When not at work, you can find Mark buried in a book or playing hurling and Gaelic football in Boston’s GAA.

Steven O’Connor
BCRP Scheduling Specialist

Steven O’Connor is a Scheduling Coordinator for the Boston Combined Residency Program (BCRP), where he works closely with residents and departmental leadership to help create a supportive, efficient, and well-organized training experience. Steven began his professional journey at Boston Children’s Hospital in 2022 after graduating from Endicott College. That same year, he also launched a professional dance career with the Boston Celtics Dance Team. Over three exciting seasons with the team—two of them as captain—Steven brought energy, leadership, and passion to the parquet floor at TD Garden. Whether he’s building schedules or leading with spirit, Steven brings a strong sense of teamwork, positivity, and dedication to everything he does.

Destiny Tolliver, MD
Associate Program Director
Boston Medical Center

Destiny Tolliver (she/her) is a primary care pediatrician and health services researcher at Boston Medical Center. She is originally from Georgia, then she attended Yale University as an undergraduate before earning her MD from the Morehouse School of Medicine. She completed residency and chief residency in the Boston Combined Residency Program, and continued her research training at the National Clinician Scholars Program at Yale School of Medicine. She then returned to Boston as an Assistant Professor of Pediatrics, where her research focuses on addressing the health impacts of children and families impacted by criminal legal system involvement. Outside of work, Destiny enjoys reading (ask her about the Boston Public Library’s Summer Reading activities!), going to live shows of all kinds, and walking around the Arnold Arboretum.