Prior to his appointment as the Chief of Medical Service, Dr. Faselis served as the Associate Chief of Medicine, the Program Director of the Internal Medicine Residency program and also as the Associate Chief of Staff for Education and Academic Affairs.

Dr. Faselis is the author of over 100 peer reviewed publications and two books in Internal Medicine. He has received several teaching awards including: Attending-of-the-Year, the Osler award and the Golden Apple award for teaching. He is the former president of the Mid-Atlantic chapter of the American Society of Hypertension and is a Fellow of the American College of Physicians and the American Society of Hypertension.

He has been selected as member of the Alpha Omega Alpha Honor Society. Dr. Faselis is a clinician educator who enjoys teaching residents and students in the inpatient and outpatient setting. His research interests include hypertension, diabetes, patient safety and medical education. He received his medical degree from the University of Athens School of Medicine and completed his residency in Internal Medicine at Cook County Hospital and Medicine Fellowship at the University of North Carolina.

 He currently is a Professor of Medicine at the George Washington University School of Medicine and Uniformed Services University.