Command Sgt. Maj. Katrina M. Herzfeld was raised in Wisconsin and Massachusetts. In 1990, she attended basic training at Fort Jackson, South Carolina and advanced individual training at Fort Gordon, Georgia. In 1991, she returned to Wisconsin as a cable systems installer, having enlisted in the U.S. Army Reserve. In 1993, she enlisted active-duty as a personnel records specialist.

Herzfeld served as a qualityaAssurance noncommissioned officer (NCO); a team chief for enlisted records; noncommissioned officer in charge (NCOIC), Civilian Pass and ID; team chief, enlisted redeployment; training NCO; NCOIC, Casualty Area Command; administrative assistant NCO; NCOIC, enlisted strength management; senior personnel sergeant; detachment sergeant; operations sergeant; first sergeant; G1 plans and operations NCOIC; NCOIC, Casualty and Mortuary Affairs Branch; NCOIC, Casualty Office Support Branch; an assistant chief of staff, G1 SGM, a battalion command sergeant major, and an inspector general sergeant major.

She was stationed with the following units: 92nd Personnel Services Company, Fort Clayton, Panama; A Detachment, 509th Personnel Services Battalion, Camp Casey, Korea; Headquarters and Headquarters Company, 101st Airborne Division (Air Assault), Fort Campbell, Kentucky; Headquarters and Headquarters Company, 25th Infantry Division, Schofield Barracks, Hawaii; 509th Personnel Services Battalion, Fort Hood, Texas; Division Special Troops Battalion, 1st Cavalry Division, Fort Hood; U.S. Army Recruiting Command Headquarters, Fort Knox, Kentucky; The Adjutant General Directorate, Human Resources Command, Fort Knox; Headquarters and Headquarters Company, U.S. Army Training Center, Fort Jackson, Special Troops Battalion, 3rd Sustainment Brigade, 3d Infantry Division, Fort Stewart, Georgia, and U.S. Army Garrison Japan, Camp Zama, Japan. Herzfeld also deployed to Iraq and Afghanistan.

Herzfeld was awarded the Bronze Star Medal, the Meritorious Service Medal (six Oak Leaf Clusters), the Army Commendation Medal (four oak leaf clusters), the Army Achievement Medal (six oak leaf clusters), the Meritorious Unit Commendation (one oak leaf cluster), the Army Good Conduct Medal (eight Knots), the National Defense Service Medal (one bronze star), the Global War on Terrorism Service Medal, the Afghanistan Campaign Medal, the North Atlantic Treaty Organization Medal, the Iraqi Campaign Medal, the Korean Defense Service Medal, the Humanitarian Service Medal, the Military Outstanding Volunteer Service Medal, the Noncommissioned Officer Professional Development Ribbon (5 numeral), Overseas Services Ribbon (5 numeral), Combat Action Badge, and Driver/Mechanic Badge (wheel device).

Her education includes the Primary Leadership Development Course, the Combat Lifesaver Course, the Field Hygiene and Sanitation Course, the Basic Noncommissioned Officers Course, the Battle Staff Noncommissioned Officers Course, the Advanced Noncommissioned Officers Course, the Operational Security Officer Course, the Unit Antiterrorism Advisor Course, and the Master Resilience Trainer Course, the Battalion Pre-Command Course, the U.S. Army Inspectors General School, and the Joint Inspectors General Course. Herzfeld is a graduate of Class 64, U.S. Army Sergeants Major Academy. She studied history at the University of Wisconsin-Milwaukee. She is a previous Fort Hood Adjutant General Noncommissioned Officer of the Year and a member of the prestigious Sergeant Audie Murphy Association.