During his three years in the Army, Captain Larson spent fifteen months as the Psychiatric Prescriber for the Special Operations Forces Embedded Behavioral Health Clinic at Joint Base Lewis-McChord, as well as six months as the Psychiatric Prescriber for the Behavioral Health Clinic for the Defense Language Institute, at the Presidio of Monterey, California. During this time, he worked with service members from all branches of the military’s Special Operations and Intelligence community, as well as soldiers with a wide variety of occupations in the Army.