Command Group


Battalion Commander
Lieutenant Colonel Estee S. Pinchasin

Battalion Command Sergeant Major
Command Sergeant Major Llirenelli Mari-Ciriaco

Lieutenant Colonel Estee S. Pinchasin

Lieutenant Colonel Pinchasin was commissioned as an Engineer Officer in July 1998. Prior to her assignment to the 19th Engineer Battalion, LTC Pinchasin served as the Deputy G35 Future Operations for I Corps, Joint Base Lewis McChord, Washington. As a lieutenant, she served as a Platoon Leader, Assistant Operations Officer, and Company Executive Officer in the 30th Engineer Battalion (Topographic), Fort Bragg, North Carolina. Upon graduating from the Aviation Captain’s Career Course, at Fort Rucker, Alabama, and the Combined Arms and Services Staff School, at Fort Leavenworth, Kansas, LTC Pinchasin was assigned to the 249th Engineer Battalion (Prime Power), Fort Belvoir, Virginia, where she served as the Battalion Logistics Officer for Operation Iraqi Freedom, Company Commander of the Headquarters and Headquarters Company, Battalion Liaison Officer in Iraq, and Battalion Adjutant. Following graduate school and promotion to major, she served as the Area Engineer for the New York Metro Area Office in the U.S. Army Corps of Engineers’ (USACE) New York District. From New York, she deployed to Kandahar, Afghanistan, to serve as Area OIC for the Kandahar Area Office, in USACE Afghanistan Engineer District – South. After completing Command and General Staff College, at Fort Leavenworth, Kansas, LTC Pinchasin was assigned to the 84th Engineer Battalion (Construction Effects), Schofield Barracks, Hawaii, and served as the Operations Officer and Battalion Executive Officer. LTC Pinchasin returned to Fort Leavenworth to attend the School of Advanced Military Studies and subsequently served as a Plans Officer in I Corps Headquarters at Joint Base Lewis McChord.

LTC Pinchasin earned a Bachelor of Arts in Computer Science from Boston University, Master of Science in Civil Engineering and the Engineer Degree in Civil Engineering from Stanford University, and a Master of Military Art and Science from the United States Army Command and General Staff College’ School.

LTC Pinchasin’s awards and decorations include the Bronze Star Medal, Meritorious Service Medal, Army Commendation Medal, the Army Achievement Medal, Parachutist Badge, Air Assault Badge and the Army Engineer Association’s Bronze de Fleury Medal.

Command Sergeant Major Llirenelli Mari-Ciriaco

Command Sergeant Major Mari-Ciriaco enlisted in the Army on June 20, 1995 in San Juan, Puerto Rico. In 1994, CSM Mari-Ciriaco graduated from Basic and Advanced Initial Training at Fort Leonard Wood, Missouri as a Technical Engineer Specialist (12T).

CSM Mari-Ciriaco has served in leadership positions ranging from Team Leader to CSM. She served in the following units: Technical Engineer Specialist, 62nd Engineer Combat Battalion (HVY), Fort Hood, TX; Instructor Writer, B-577th Engineer Battalion, Fort Leonard Wood, MO; Force Protection NCO, HHC, US ARCENT-Kuwait; Technical Engineer Drafter NCO, Armed Force-North (AFNORTH), Brussum, The Netherlands; Senior Technical Engineer Sergeant, 18th Engineer Brigade, Heidelberg Germany; Operations Bridge Chief NCO, 20th Engineer Brigade (CBT) (HVY), Fort Bragg, NC; Heavy Maintenance Supervisor and HHC, 1st First Sergeant, 249th Engineer Battalion, Prime Power, Fort Belvoir, VA and Construction Operations Sergeant Major, 573rd Construction Management Team, 555th Engineer Brigade, Joint Base Lewis McChord, WA.

CSM Mari’s deployments include Operation Joint Endeavor-Bosnia Herzegovina; ARCENT-Kuwait, Bulgaria, Operation Enduring Freedom-Afghanistan, Operation Iraqi Freedom-Iraq and Operation Freedom’s Sentinel-Afghanistan.

Her military awards and decorations include Bronze Start Medal (2 OLC), Meritorious Service Medal (2 OLC), Joint Service Commendation Medal, Army Commendation Medal (5 OCL), Army Achievement Medal (4 OCL), Meritorious Unit Commendation, Army Superior Unit Award, Army Reserve Commendation Medal, Good Conduct Medal (6th Award), National Defense Service Medal (2 Bronze Service Stars), Armed Force Expeditionary Medal (2 Bronze Service Stars), NATO Medal, Global War on Terrorism Expeditionary Medal, Iraqi Campaign Medal, Afghanistan Campaign Medal (2 Bronze Service Stars), Global War Terrorism Expeditionary Medal, Global War On Terrorism Service Medal, Armed Force Service Medal, Humanitarian Service Medal, NCO Professional Development Ribbon (Numeral 3), Army Service Ribbon, Overseas Service Ribbon (Numeral 2), NATO Medal; Kuwait Liberation Medal.

CSM Mari graduated from the United Stated Army Sergeant Major Academy (Class 63), and completed the entire NCOPDS, BLC, ALC, and SLC. She completed the Senior Enlisted Joint Professional Military Education (SEJPME), Joint Command, Control and Information Operations School (JC2IOS) from the Joint Forces Staff College, Norfolk, VA, Operations Contracting Support Course, Joint Engineer Operations Course, and Facilities Engineer Course. CSM Mari holds Bachelor in Science in Construction Management and Master in Science in Engineer Management from Missouri University Science and Technology in Missouri. She earned the Associate Engineer Management Certification. CSM Mari is a recipient of the Bronze de’Fleury Medal.


19th Engineer Battalion
175 N Tornado Division Road
Fort Knox, Kentucky 40121

Telephone: (502) 624-4511

Staff Duty
Telephone: (502) 624-1919

Telephone: (502) 624-4395

Telephone: (502) 624-4465

S-1 Office
Telephone: (502) 624-4378

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Support Assistant

Telephone: (502) 624-3670


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Updated 4 Oct 2016

Fort Knox Information - (502) 624-1000

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