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COL Geoffrey Grammer

USA (Ret.), MD, Scientific Advisor

My Story

A decorated Colonel with the United States Army, Dr. Grammer serves as Chief Medical Officer of Greenbrook TMS, the world’s largest Transcranial Magnetic Stimulation (TMS) Therapy provider, where he developed and implemented policies, procedures, and training at over 120 treatment centers. Dr. Grammer created one of the very first TMS Therapy centers in the United States, and he is valued as a leading practitioner. Dr. Grammer completed two deployments to Iraq, serving as Medical Director for the 785th Combat Stress Control Company and later as a psychiatrist at the Combat Support Hospital at Contingency Operating Base Speicher. He also deployed to Afghanistan as a psychiatrist at the Combat Support Hospital in Bagram.


Dr. Grammer served a variety of leadership positions in the Army, including Chief of Inpatient Psychiatric Services at Walter Reed National Military Medical Center, Department Chief of Research at the National Intrepid Center of Excellence, and National Director for the Defense and Veterans Brain Injury Center. He is published in numerous peer reviewed journals and has authored several book chapters.


Dr. Grammer graduated from Virginia Polytechnic Institute with a Bachelor of Science degree in Biology and earned his medical degree from the Uniformed Services University of Health Sciences. He holds board certification in Psychiatry, Geriatric Psychiatry and Behavioral Neurology & Neuropsychiatry.

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