Dr. Lennen is a native of Upstate New York. His undergraduate education was performed at Union College in Schenectady New York.  His medical education was completed at Geporgetown University Medical School  ande residency at Georgetown University Medical Center from 1988 to 1994 undera military scholarship program.  His fellowship training in Total Joint and Adult Reconstruction was completed atr Johns Hopkins University.  He served active duty as a Major in the United States Air Force iat the US Naval Hosopitral at Portsmouth, VA, where he participated oin the training of Navy Orthopaedic residents.  Since 1998 he has been in private practice in Virginia, Florida, and now in Southern Mary;land.  He is proficient in General Orthopaedic care as well as total joint and reconstruction of the hip and knee.