
Memorial Sloan Kettering's radiation oncology residents and fellows.
Our residents come from diverse educational and personal backgrounds, but all share a passion for radiation oncology clinical practice and research. We are also fortunate to have two fellows as part of our department, specializing in brachytherapy and protons.
We work and learn together — in a single residents’ room — and consider the camaraderie of the residents and fellows one of the major strengths of our residency program.
First-Year Residents (July 2020 – June 2024)
David Billing, MD, PhD

Bill Diplas, MD, PhD

Jennifer Ma, MD

Patricia Santos, MD

Reith Sarkar, MD

Deborah Smith, MD

Second-Year Residents (July 2019 – June 2023)
Morgan Freret

Harper Hubbeling

Emily Schapira Lebow

Zachary Moore

Victor Ng

Kathryn Tringale

Third-Year Residents (July 2018 – June 2022)
Ishita Chen, MD, PhD

Xiaojing Huang, MD, PhD

Dillon Li, MD, MPH

Achraf Shamseddine, MD, PhD

Neil Ari Wijetunga, MD, PhD

Fourth-Year Residents (July 2017 – June 2021)
I was born in China and grew up in Vancouver, Canada. I completed my undergraduate studies in chemistry and physics at Harvard University, where I also received a master’s degree in chemistry. I then joined the MD/PhD program at UT Southwestern Medical Center, where I studied the mechanism of innate immune and inflammatory signaling as a Howard Hughes Medical Institute fellow under the mentorship of Zhijian Chen. I completed a transitional year internship at MSK prior to joining the Radiation Oncology Residency Program.
I grew up in Massachusetts and attended Boston College, where I received an undergraduate degree in biochemistry. I then entered the MD/PhD program at Yale School of Medicine. For my doctoral thesis, I designed and tested novel synthetic compounds that targeted prostate cancer for immune destruction. I completed a preliminary medicine internship at Yale New Haven Hospital before joining the Radiation Oncology Residency Program at Memorial Sloan Kettering.
I was born and raised in southwest Missouri. I majored in biomedical engineering at Duke. In college, my interest in research was sparked when I joined a lab focused on seeding human endothelial progenitor cells onto metal vascular implants with the goal of reducing blood clots. While earning my medical degree at Weill Cornell, I spent a year studying DNA damage repair in the lab of Simon Powell here at MSK. I was also fortunate to have the opportunity to spend a month of my medical training with radiation oncologists in India, which afforded me a unique perspective on the global delivery of care. I completed a medical internship at Brown University before joining MSK’s Radiation Oncology Residency Program.
I grew up in Chesapeake, Virginia, but spent much of my time across the state line in Currituck, North Carolina. After earning a chemistry degree from the University of North Carolina at Chapel Hill, I entered the Medical Scientist Training Program at the Medical University of South Carolina. As an MD/PhD student in David Cole’s lab, I studied the role of cytokines in adoptive T cell therapy. Upon graduation, I completed a transitional year internship at MedStar Harbor Hospital in Baltimore before joining the Radiation Oncology Residency Program at Memorial Sloan Kettering.
I grew up on the North Shore of Chicago and attended Duke University, where I designed a major to explore the biopsychosocial determinants of health and conducted neuro-oncology research. Before medical school at Stanford, I worked on clinical trials evaluating hypofractionated stereotactic radiosurgery for brain tumors under the mentorship of Scott Soltys. As a medical student, I continued my clinical and translational research on circulating tumor DNA as a Radiological Society of North America grant recipient in the lab of Max Diehn. I also led medical student wellness initiatives. I completed my internship at Cambridge Health Alliance of Harvard Medical School before joining the Radiation Oncology Residency Program at Memorial Sloan Kettering.
I was born and raised in Rochester, New York, and attended Cornell University, where I received degrees in political science and biological sciences. Subsequently, I completed my medical training at Johns Hopkins University School of Medicine, where I studied tumor immunology in a preclinical model of glioblastoma as a Howard Hughes Medical Institute research fellow. Prior to joining Memorial Sloan Kettering’s Radiation Oncology Residency Program, I completed a categorical internship in otolaryngology-head and neck surgery at Washington University/Barnes-Jewish Hospital in St. Louis.
Brachytherapy Fellow (July 2020-June 2021)
Assaf Moore, MD
