About Us


Commander, U.S. Army Medical Department Activity-Japan

Colonel Jeremy D. Johnson graduated from the United States Military Academy in 1996, where he lettered in men’s basketball and earned a Bachelor of Science Degree with Honors in Life Sciences. He obtained a Medical Doctorate (MD) from the Uniformed Services University of the Health Sciences (USUHS) Medical School in Bethesda, MD (2000), a Master of Public Health from the University of Washington (2008), and a Master of Strategic Studies from the U.S. Army War College (2022).

Colonel Johnson completed his Family Medicine Residency at Dewitt Army Community Hospital, Ft. Belvoir, VA and a Faculty Development Fellowship at Madigan Army Medical Center where he was also a faculty physician. At Tripler Army Medical Center he served in positions of increasing leadership to include the Family Medicine Residency Associate Program Director, Program Director, and Acting Department Chief of two clinics with a patient population of 18,000.

He deployed to Baqubah, Iraq during OIF as a Battalion Surgeon for 1-25 SBCT.

Colonel Johnson previously commanded the Coleman Barracks Health Clinic in Mannheim, Germany.  He served as the Deputy Commander for Medical Services at Brian D. Allgood Army Community Hospital in Seoul, South Korea and as the Command Surgeon for US Army Alaska.

He is a graduate of the Army Medical Department Officer Basic Course, the Army Medical Department Captain’s Career Course, the Command and General Staff College, and the U.S. Army War College.

Colonel Johnson’s decorations include the Bronze Star, Meritorious Service Medal (with four Oak Leaf Clusters), Army Commendation Medal, Army Achievement Medal (with six Oak Leaf Clusters), Meritorious Unit Commendation, the National Defense Service Medal, Iraqi Campaign Medical, Global War on Terrorism Service Medal, Korea Defense Service Medal, Armed Forces Service Medal, Overseas Service Ribbon, and the Expert Field Medical Badge. He is a recipient of the Order of Military Medical Merit and the Army Surgeon General’s 9A Proficiency Designator.

He is a Board Certified Family Physician and a Fellow in the American Academy of Family Physicians. He has published nine research articles in peer-reviewed medical journals and has presented extensively on the topics of leadership and medicine.

Colonel Johnson, originally from Colorado Springs, CO, is married to the former Jennifer Hogen and they have three wonderful daughters.

Sergeant Major


Sergeant Major WESLEY D. DAVIS
Chief of NCO, U.S. Army Medical Department Activity-Japan

SGM Davis enlisted into the Army from Orlando Florida. He attended and graduated Basic Training from Fort Jackson, SC, in January of 2000 and later graduated from Fort Sam Huston, TX, in July 2000 with the MOS 91B Combat Medic.
SGM Davis previous assignments are: V Corps Surgeon Cell Sergeant Major and Medical Operations NCO,  Fort Knox, KY; XVIII Airborne Corps Surgeon Cell Sergeant Major and   44th Medical Bridge Operations Sergeant Major, Fort Bragg, NC;  1SG Delta Company Joint Base San Antonio, TX;  Joint Visitor Bureau (FWD IZ); Platoon Sergeant (FWD AF) 2 Cavalry Regiment; Senior Drill Sergeant Bravo Company 239 Fort Jackson SC; Ortho Clinic NCOIC Fort Meade MD; Combat Medic (FWD IZ) and Health Care Specialist 82nd Airborne Division Fort Bragg, NC.  

SGM Davis’s military education includes Emergency Medical Technician-Ambulatory Course, Airborne School, Field Sanitation Course, Combat Lifesaver Course, Tactical Combat Casualty Course, Facilitator Developer Course, Orthopedic Technician Course, Environmental Compliance Officer Course, Combative level 1 and 2 certified, Instructor Training Course, Advanced Trauma Life Support Course, Basic Leader Course, Advanced Leaders Course, Drill Sergeant School, Senior Leaders Course, Master Leaders Course and CO CDR/1SG Course, and is a graduate of the Sergeants Major Course (Resident). Class 73 (Motivate and Serve!)

SGM Davis’s awards and decorations include the Distinguished Meritorious Service Medal (6th award), Joint Service Commendation Medal, Army Commendation Medal (4th award), Army Achievement Medal (6th award), Good Conduct Medal (7th award), National Defense Service Ribbon, Joint Meritorious Unit Award, Meritorious Unit Award, Afghanistan Campaign Medal, Iraqi Campaign Medal, Global War on Terrorism Expeditionary Medal, Global War on Terrorism Service Medal, Non-Commissioned Officer Professional Development Ribbon (5th numeral), Army Service Ribbon, Overseas Ribbon (3rd award). The Drill Sergeant Badge, Combat Action Badge (CAB), Parachutist Badge, Expert Field Medic (EFMB) and Germany Jump Wings. 

SGM Davis is a member of the Order of Military Medical Merit, and holds an Associates of Science from Excelsior University, a Bachelor of Science degree from Excelsior College, and a Master’s degree in Education from Trident Universtiy.






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