Julia S. Sibilla

Julia Sibilla served as the Deputy Garrison Commander at U.S. Army Garrison Fort Sill, until the end of 2025. A role she assumed in October 2020. She brings more than 25 years of experience in installation management, stabilization operations, and Soldier and Family Support across Europe, Africa, and the Middle East. Former Ft. Sill Role Title: Deputy Garrison CommanderOrganization: U.S. Army Garrison Fort SillTenure: October 2020 – 2025 Professional Background Prior to her assignment at Fort Sill, Sibilla served with the U.S. Department of State, Conflict and Stabilization Operations (Africa Bureau), where she was a Defense Senior Leadership Development Program (DSLDP) Fellow and Stabilization Advisor. She previously held multiple senior roles within the Department of Defense, including: Strategic Planner, Operations Directorate, Office of the Assistant Chief of Staff for Installation Management (G-9), The PentagonSite Director / Deputy Garrison Manager, Novo Selo Training Area (NSTA), BulgariaServed as the inaugural Site Director, establishing base operations for IMCOM in the Black Sea regionOperations Officer, MK Air Base, RomaniaDirector and Supervisory Program Manager, Army Community Service, USAG Italy (Vicenza) Her work has included subject-matter expertise in forward operating sites (FOS), contingency basing, and installation support in the Black Sea Area of Responsibility. International & Interagency Experience In addition to DoD and State Department service, Sibilla has: Worked as a United Nations staff memberServed as a DoD education contractorSupported programs across Europe and the Middle EastCompleted brief deployments to Iraq, Djibouti, and Afghanistan Education M.S., National Security Strategy — National War College, National Defense University (2020)Distinguished Graduate; Writing Excellence AwardM.S., Management — Boston University (Brussels, Belgium)M.A., Humanities — California State University, Dominguez HillsB.A., History — The Catholic University of America Professional Development & Training Defense Senior Leader Development Program (DSLDP), Cohort 2019 (Graduated 2021)Strategic Planning Course, Army War CollegeSenior Manager’s Course for National Security Strategy, George Washington UniversityJoint Humanitarian Operations Course, USAIDAnti-Terrorism II Officer CourseMediation Training, Justice Center of AtlantaExecutive Leadership Development Program (ELDP) Awards & Honors Meritorious Civilian Service MedalSuperior Civilian Service Award (2)Commander’s Award for Civilian Service (5)Army Achievement Medal (3)NATO Rapid Reaction Force – French Commanding General’s Award for ExcellenceIMCOM-E Phenomenal Woman of the Year (USAG Italy)USAG Italy Volunteer Family of the Year Personal Julia Sibilla is married to Angelo Sibilla, a retired Italian Infantry Officer, and is the mother of two daughters. Notes This page documents Ms. Sibilla’s professional and leadership roles in federal civilian service.Dates and assignments reflect official career chronology. Sources U.S. Army Garrison Fort Sill leadership biographyDepartment of Defense and Department of State public records