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About Us > Leadership

About Leadership

The NICoE leadership and staff are comprised of experts from across military medicine and academia, as well as clinical researchers with experience translating research into practice.


Walt Greenhalgh, M.D 

Walter Greenhalgh, M.D.

Captain Walt Greenhalgh is currently the Director for the National Intrepid Center of Excellence (NICoE), Walter Reed National Military Medical Center WRNMMC), Bethesda Maryland. Prior to his selection for this position he served as the NICoE’s Department Chief of Clinical Operations.

Captain Greenhalgh, raised near Philadelphia Pennsylvania, earned a Bachelor of Science Degree in Microbiology and Immunology from McGill University, Montreal Quebec Canada, and then attended Medical School and earned his Doctor of Medicine degree on a Navy Health Professions Scholarship at Thomas Jefferson University, Philadelphia Pennsylvania. Upon completing an internship in General Surgery at National Naval Medical Center, Bethesda Maryland, CAPT Greenhalgh then received his Flight Surgeons wings after Training in Pensacola Florida, followed by a tour at US Marine Corps Base Quantico Virginia.  CAPT Greenhalgh then completed training in Family Medicine at the Puget Sound Family Medicine Residency, Naval Hospital Bremerton Washington, where he also served as Chief Resident.

Family Medicine staff tours included Naval Hospital Naples-Branch Medical Clinic Gaeta Italy, where he also was Senior Medical Officer, followed by a tour as staff Family Physician at Naval Health Clinic Quantico Virginia, where he was the Director of Primary Care and Chairman of the Executive Committee of the Medical Staff (ECOMS).   He was then selected as the first Navy Family Physician and Flight Surgeon to support the US Air Force Flight Medicine Clinic at the Pentagon, and then went back overseas to Naval Hospital Rota Spain, serving as both Family Physician and Flight Surgeon, and also assuming the position of ECOMS Chair and then Director of Medical Services.

CAPT Greenhalgh was then selected to attend the Naval War College, Newport Rhode Island, where he received a Masters of Arts Degree in National Security and Strategic Studies.  This was followed by orders to the Navy Bureau of Medicine and Surgery, Washington, DC, where he served on the Navy Medical Corps Chief’s staff as the Plans and Policy Officer and as the acting Deputy Medical Corps Chief.  During this tour he also deployed to Djibouti Africa, where he served as the Combined Joint Task Force-Horn of Africa Force Surgeon.

Captain Greenhalgh is Board Certified in Family Medicine and is a member of the American Academy of Family Physicians and of the Uniformed Services Academy of Family Physicians.   His awards include the Defense Meritorious Service Medal (times two), the Meritorious Service Medal (times three), Navy/Marine Corps Commendation Medal, Navy/Marine Corps Achievement Medal (times two), and various unit and qualification ribbons.  He is married to Heidi (Germer) Greenhalgh, and they have three children, Mark, Andrew, and Abigail.


Louis M. French, PsyD 

Louis M. French, PsyD
Deputy Director for Operations

Dr. French is the Deputy Director for Operations at the National Intrepid Center of Excellence (NICoE), Walter Reed National Military Medical Center (WRNMMC), where he participates in a diversified research portfolio. Dr. French is principal investigator on seven studies of TBI in returning service members, including the Congressionally mandated, 15-year study of the natural history of TBI in military service members. He is a lead investigator and Co-Director of the Phenotyping Core with the Center for Neuroscience and Regenerative Medicine, a program that integrates research efforts on TBI and PTSD between the DoD and the National Institutes of Health. He has published over 50 peer-reviewed journal articles and book chapters in the area of military TBI and neuropsychology.

Dr. French has helped shape current policy on screening and treatment for TBI on the battlefield and at home with his participation in multiple Federal panels and workgroups about TBI in the military, including the Army Surgeon General’s Taskforce on TBI, whose report provided the foundation for the structure of TBI screening and treatment that is currently in place in the DoD. He was one of the authors who reshaped the Standardized Assessment of Concussion to construct the Military Acute Concussion Evaluation, the standard for concussion screening in theater.

Dr. French served as Chief, Traumatic Brain Injury at Walter Reed Army Medical Center and at WRNMMC, prior to the integration of all TBI services on the WRNMMC campus in late 2014. He is chairman of the Joint Traumatic Brain Injury Task Force, which coordinates TBI care in the National Capitol Region Medical Directorate. He is also the site director for the Defense and Veterans Brain Injury Center at Walter Reed, the largest site in that network. He is responsible for overseeing all aspects of the screening, assessment and rehabilitation of those with TBI at the flagship military care facility in the DoD network. He holds faculty positions in the Departments of Neurology and Rehabilitation at the Uniformed Services University of the Health Sciences.

Dr. French received his doctorate in clinical psychology, focused on assessment, from the George Washington University. He completed fellowships in clinical and experimental neuropsychology at the National Institutes of Mental Health and in neuropsychology focusing on traumatic brain injury at the Defense and Veterans Brain Injury Center at Walter Reed Army Medical Center.