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First Army

Home : Mission : Units : Division West : Leadership : Biography View

Command Sergeant Major Eric B. Olsen

120th Infantry CSM

CSM Eric B. Olsen
Brigade Command Sergeant Major
CSM Eric B. Olsen is a native of Muskegon, Michigan and enlisted in the Army in October of 1995 as an
Infantryman.
CSM Olsen first served in Schofield Barracks, Hawaii in 2-5 Infantry BN and the Long Range Surveillance
Detachment until 1999. Since then, he has served in a number of broadening and successive assignments
including the Denver Recruiting Battalion with service in Sterling, CO; Squad Leader and Platoon Sergeant
with the 172nd SBCT in Fort Wainwright, AK; First Sergeant for 6th Ranger Training Battalion at Eglin AFB,
for 1-23rd Infantry, and Brigade HHC, 3-2 SBCT in Joint Base Lewis-McChord; Operations SGM for 1-8
Infantry Battalion, and Command Sergeant Major for 2-23 Infantry Battalion in Fort Carson; Senior Enlisted
Leader for the 4th Infantry Division HQ (FWD) under US Army Europe in support of Operation Atlantic
Resolve. CSM Olsen last served as the Commandant for Henry Caro NCO Academy, Maneuver CoE, Fort
Benning, GA. CSM Olsen assumed responsibility of the 120th Infantry Brigade on 17 April 2020.
CSM Olsen has two combat deployments; Operation Iraqi Freedom (16mos) and Afghanistan in 2012
(9mos).
His military training and education includes Ranger School, the Navy Scuba Diver Course, Basic
Mountaineering Course, Air Assault Course, the Basic Airborne and Jumpmaster Courses, all
complemented by every level of NCOPDS. Furthermore, he earned his Bachelor’s Degree in Military
Management through Excelsior College.
His awards and decorations include the Bronze Star Medal (1 OLC), Meritorious Service Medal (2 OLC),
Army Commendation Medal (2 OLC), Army Achievement Medal (5 OLC), Expert Infantryman’s Badge,
Ranger Tab, Scuba Badge, Air Assault Badge, and the Master Parachutist Badge. He is also the recipient
of the National Infantry Association’s Order of St. Maurice-Centurion level, the Sergeant John Ordway
Award, and is a Distinguished Member of the 23rd and 54th Infantry Regiments.
CSM Olsen is married to the former Hyangpyo “Supia” Lee, and their son Nathan is currently serving as a
member of the Old Guard.