Dr. Jacob Collen is a Pulmonary, Critical Care and Sleep Medicine physician and professor of medicine at the Uniformed Services University and Walter Reed National Military Medical Center in Bethesda, Maryland.  He has been the module director for the Cardiopulmonary Renal Module in the first year of medical school at the Uniformed Services University since 2017. Dr. Collen attended the Uniformed Services University of the Health Sciences, graduating with an MD in 2002. He has worked as an Army physician in San Antonio, Texas, Germany, Iraq, Afghanistan, and has been in Bethesda since 2015.