The Georgetown Downtown Campus

While the academic content and advising for Georgetown Downtown (GTDT) is the same as the Georgetown University Medical Campus (GUMC), there are a few unique aspects of the GTDT SMP.

  • Small class size
  • On-site faculty dedicated to providing facilitated learning and review sessions
  • Medical and graduate courses are given via lecture capture and reviewed by students prior to class time
  • In-class sessions useĀ a team-based learning paradigm, relying on peer interactions and active participation by all students: the sessions are facilitated by medical school faculty
  • Structured clinical volunteer experiences to enhance your understanding of physician/patient/healthcare worker interactions.

GTDT On-Site Faculty


Marina Castilla, MD

Dr. Marina Castilla graduated from the University of Maryland School of Medicine in 2011. She has taught undergraduate and graduate anatomy and physiology courses at George Mason University as part of the GeorgeSquared Biomedical Sciences Programs.

Dr. Castilla is an SMP Team Leader, and provides daily oversight of the GTDT SMP campus. She teaches Principles of Gross Anatomy and Advanced Pathophysiology as well as the non-cadaveric gross anatomy lectures for the Cardiopulmonary, GI, and Sexual Development & Reproduction medical courses at the GTDT campus.

Holly Frost

Holly Frost, MS

 Holly Frost, MS, NR-P, received her MS in Physiology from Georgetown University in 2001, and is an instructor at the GTDT campus. A long-time paramedic, she has additionally been a health and medicine educator for over 25 years.  She is also a former assistant dean of emergency medical services and is an exceptional resource for our students. Her favorite topics to teach are pathophysiology, gross anatomy and forensic medicine.

Michael Nelson, MS

Michael Nelson, MS, is an instructor at the GTDT campus. He received his M.S. in Physiology from Georgetown University. Michael received an undergraduate degree in Chemistry, Kinesiology & Sport Science, and Spanish as well as his M.A. in Science Education from the University of South Dakota. As a former teacher and SMP alum, he is dedicated to pushing his students to excel in their rigorous biomedical coursework and continue on to successful careers in medicine.