Dr. Greenwald is Chief of the Division of Pediatric Critical Care Medicine, Executive Vice-Chair for Operations for the Department of Pediatrics, and Professor of Clinical Pediatrics at Weill Cornell Medicine. He oversees the NewYork-Presbyterian Hospital/Weill Cornell Medical Center's Pediatric Critical Care Center, a 23-bed multidisciplinary intensive care unit providing state-of-the art care for the most seriously ill and injured infants, children, and adolescents. The unit specializes in the care of children (up to 21 years of age) with challenging forms of respiratory failure due to severe pneumonia, asthma or viral illnesses, circulatory shock due to overwhelming infection or cardiac failure, and provides post-surgical care for children following cardiac and neurological surgery. Dr. Greenwald received his medical degree (M.D.) at New York University School of Medicine. He completed his residency at New York University Medical Center & Bellevue Hospital, where he also served as chief resident, and then completed a fellowship in Pediatric Critical Care Medicine at New York Hospital, Cornell University Medical College (now NewYork-Presbyterian Hospital, Weill Cornell Medicine). In addition to his clinical, teaching, and research activities at Weill Cornell Medicine, Dr. Greenwald has contributed to the national development of critical care medicine as a vital pediatric sub-speciality. He co-Chaired the Society of Critical Care Medicine's Program Committee for the 2010 International Critical Care Congress. He is one of the founding members of the New York Society of Pediatric Critical Care Medicine, serving as the Society's President from 1993 to 1995. He is a Fellow of the American College of Critical Care Medicine and served the College as a member of its Board of Regents from 2011 to 2019, and as its Chancellor from 2107 to 2018.