Marvin Sexton received his MD from UAB, and completed his internal medicine (including Chief Medical Resident), pulmonary, critical care and sleep medicine – and is now ABIM certified in Internal Medicine, Pulmonary Medicine, Critical Care Medicine, and Sleep Medicine. Marvin has spent his career at Dothan Pulmonary Associates, the only pulmonary medicine practice in Dothan serving both hospitals. He has been held multiple leadership positions in the Dothan medical community, having served in the recent past as Chief of Medicine, Medical Director of Critical Care Medicine and Medical Director of Sleep at Southeast Health Hospital. He also teaches at the Alabama College of Osteopathic Medicine. His practice is enormous, and facilitates recruitment into challenging respiratory protocols. Since 2017, Marvin has been active in clinical research, serving as both PI and SubI on COPD, asthma and IPF studies performed at SEC Clinical Research.