Captain Richard Gilliard, Jr.
Director, U.S. Naval Hospital Okinawa
Commanding Officer, U.S. Navy Medicine and Readiness Training Command Okinawa
Captain Richard Gilliard Jr. is a native of Gary, Indiana. He enlisted in the U.S. Navy as a Yeoman and subsequently volunteered for Submarine Duty and completed Basic Submarine School in Groton, Connecticut. Captain Gilliard earned a B.S. degree in Healthcare Management from Southern Illinois University, Carbondale, IL. He received a commission through the Medical Service Corps In-service Procurement Program in December 1999. Captain Gilliard also holds a Master of Business Administration from the Naval Postgraduate School.
Operationally, Captain Gilliard served onboard the USS GROTON (SSN 694) in Groton, Connecticut and USS RHODE ISLAND (SSBN 740)(BLUE) in Kings Bay, GA. He also served in the following staff positions; administrative assistant, Naval Reactors Headquarters, Washington, DC; Washington placement detailer for Shore Special Programs, Naval Personnel Command, Millington, TN; interim director for administration, Naval Medicine Information Management Center (NMIMC), Bethesda, Maryland; Medical Service Corps/Dental Corps officer community manager, Bureau of Naval Personnel, Millington, TN; and Branch Head, Medical Manpower and Resources (N0931C) at the Office of the Chief of Naval Operations.
His healthcare leadership assignments include clinic manager/division officer of Primary Care Services and special assistant to the Commanding Officer at U.S. Naval Hospital Rota, Spain. Captain Gilliard as selected for three milestone tours serving as director for administration at Naval Health Clinic Charleston, Navy Medicine Readiness & Training Command/Naval Hospital Jacksonville, and Navy Medicine Readiness & Training Command/Naval Medical Center San Diego.
In July 2023, Captain Gilliard assumed duties as the Director of U.S. Naval Hospital Okinawa and Executive Officer of U.S. Navy Medicine Readiness & Training Command/U.S. Naval Hospital, Yokosuka, Japan comprised of the hospital and six Branch Health Clinics across four different countries. He led a team of 1,300 military, contract, civilian, and host nation master labor contractors in support of 7th Fleet, III MEF and forward deployed Naval Forces in the INDOPACOM area of responsibility. Captain Gilliard is now the Commanding Officer for, U.S. Navy Medicine Readiness & Training Command, Okinawa, Japan, and Director, U.S Naval Hospital Okinawa, Japan.
His personal awards include Meritorious Service Medal (five awards), Navy and Marine Corps Commendation Medal (two awards), and Navy and Marine Corps Achievement Medal (four awards). Captain Gilliard completed Joint Military Professional Education (JPME) Phase 1 from Naval War College Monterey. He is an alumnus of the Interagency Institute for Federal Health Care Executives, a member of the American College of Healthcare Executives (ACHE) and earned the Professional in Human Resources (PHR) certification.
Captain Robyn M. Treadwell
Deputy Director, U.S. Naval Hospital Okinawa
Executive Officer, U.S. Navy Medicine and Readiness Training Command Okinawa
Originally from Austin, Texas, Captain Robyn Treadwell received her Bachelor of Arts degree in Biology, Spanish, and Latin American Studies (triple major) from Brandeis University. She graduated from the University of Texas Health Science Center- San Antonio School of Medicine and completed her Psychiatry internship at Boston University. CAPT Treadwell concluded training in the Psychiatry Residency and Child and Adolescent Psychiatry Fellowship at the University of Massachusetts in Worcester. While a resident, she joined the Navy as an inactive reservist through the Financial Assistance Program (FAP).
Upon completing her training, she reported to her first duty station at Naval Medical Center Portsmouth (NMCP) as a staff Child and Adolescent Psychiatrist. In 2013, she deployed with the Combat Logistics Regiment II Concussion Restoration Care team to Camp Leatherneck, Afghanistan, to support Operation Enduring Freedom. Upon her return to NMCP, she led as the division officer of Child Mental Health.
She has steered quality improvements as Clinical Champion for Health Effectiveness Data and Information Set (HEDIS) for the Directorate of Mental Health, a TeamSTEPPS Master Trainer, and trained as a Lean Six Sigma Green Belt enhancing collaboration and efficiency in the Exceptional Family Member Program at U.S. Naval Hospital Yokosuka Japan and Fort Belvoir Community Hospital (Virginia). While in Japan, she served as Director of Healthcare Business and the Fleet Mental Health provider for the USS John S. McCain, responding to their tragic 2017 collision in Singapore.
Returning to Virginia, CAPT Treadwell established herself as a dynamic faculty member. She led the military's only inpatient adolescent psychiatry unit (Fort Belvoir) and highlighted joint education and training as the Deputy Director for Education, Training, and Research (DETR) then as Director. She joined the Bureau of Medicine and Surgery (BUMED) in 2021 as the Deputy Director for Mental Health then transitioned to the Office of the Medical Corps Chief as the Plans and Policy Officer in February 2023. During her time at BUMED, the briefed the Chief of Naval Personnel, the Vice Chief of Naval Operations, and House and Senate Armed Services Committee staff on critical topics leading to system-wide impacts. She also managed the Medical Corps Chiefs Office social media presence.
CAPT Treadwell returned to NMCP as the Director for Mental Health in June 2024 and was the NMCP Line of Effort 4 (Recruitment and Retention) Cross-functional Lead, establishing a collaborative model between the regional Navy Talent Acquistion Group and the hospital. She was competitively selected as a Military medical Ambassador in 2025 to showcase the unparalleled career opportunities in Navy Medicine.
A strong proponent of graduate medical education, CAPT Treadwell served as the Navy Intern Specialty Leader from 2021-2025, ensuring a smooth transition to the straight-through training pipeline and the GME to GMO pilot. CAPT Treadwell completed the Executive MBA for Physicians at the Heller School for Social Policy and Management at Brandeis University in May 2025.
CAPT Treadwell joined U.S. Navy Medicine Readiness and Training Command Okinawa as the Executive Officer in Jun2 2026.
CAPT Treadwell is board certified in General Psychiatry and Child and Adolescent Psychiatry by the American Board of Psychiatrists and Neurologists. She is an Assistant Professor of Psychiatry at the Uniformed Services University of the Health Sciences. She attained fellowship status with the American College of Healthcare Executives in 2024. Her military decorations include the Defense Meritorious Service Medal, the Meritorious Service Medal (four awards), the Navy and Marine Corps Commendation Medal, and the Fleet Marine Force Warfare Officer designation. In 2025, CAPT Treadwell was recognized as an honorary member of Phi Delta Epsilon, an honor only 5 have received in the last 20 years.
CMDCM (AW/SW) Derek G. Nelson
Command Master Chief
U.S. Naval Hospital Okinawa, Japan
A native of Bullhead City, Arizona and a graduate of Mohave High, Command Master Chief (AW/SW) Derek G. Nelson entered the Navy through Recruit Training Command, Great Lakes in October 2003. Upon completion of Basic Training, he was assigned to Basic Airman Apprenticeship School in Pensacola FL.
Nelson’s duty assignments include Patrol Squadron One (VP-1), where he converted to the rate of Aviation Maintenance Administration; NRS Las Vegas Southwest Recruiter in Charge at Navy Recruiting District San Diego, CA, where he converted to the rate of Navy Career Counselor (CRF); Division Five Leading Chief Petty Officer at Navy Recruiting District Phoenix, Arizona, where he selected to Chief Petty Officer in 2011; Senior Enlisted Leader at Navy Recruiting District Philadelphia where he was selected for Senior Chief Petty Officer in 2016; and Assistant Chief Recruiter at Navy Recruiting District Los Angeles. He was selected into the Command Senior Chief Program in 2021 and reported to USS JACKSON (LCS 6) GOLD. During that tour he completed back to back 7th and 3rd Fleet deployments. His second CMC tour he was assigned as the CMC at Fleet Logistics Multi Mission Squadron Three Zero (VRM-30) from 2023 to 2025. He is currently assigned as the Command Master Chief of Naval Hospital Okinawa.
He is a graduate of the Senior Enlisted Academy (201 Red) and CMC/COB course 180. Major Command CMC Course #25090. He earned an Associates of Science Degree in Professional Studies, a Bachelors Degree of Science in Leadership, and a Master’s Degree of Science in Human Resource Management from Trident University.
His personal decorations include the Meritorious Service Medal, Navy and Marine Corps Commendation Medal (four awards), Navy and Marine Corps Achievement Medal (four awards), Military Outstanding Volunteer Service Medal, Navy Expert Rifleman Medal, Navy Expert Pistol Medal and various campaign and unit awards.