Command Master Chief Robert Ryan B. Pagcaliwagan assumed the role of Command Senior Enlisted Leader at 1st Medical Battalion in December 2025. A native of the Philippines, he enlisted in the U.S. Navy in September 1997 as an Undesignated Striker. He completed Basic Hospital Corpsman “A” School in February 1999, Field Medical Technician “C” School in May 1999, and Advanced Laboratory Technician “C” School June 2000.
His sea duty assignments include USS CONNOLLY (DD-979), Supply Battalion - 1st Force Service Support Group, 1st Medical Battalion - 1st Marine Logistics Group, U.S. Branch Health Clinic Diego Garcia, Marine Aircraft Group 39 - 3rd Marine Aircraft Wing, USS MICHAEL MURPHY (DDG-112). His shore assignments include Naval Hospital Camp Pendleton, Naval School of Health Sciences San Diego, Naval Medical Center San Diego, Navy Medicine Readiness and Training Command Naples, and NAVSUP Fleet Logistics Center Pearl Harbor.
His deployments include Counter Drug Operations on USS CONNOLLY in 1998, Operations Enduring Freedom/Iraqi Freedom/New Dawn in 2003, Western Pacific/Iraq with the 13th Marine Expeditionary Unit Service Support Group in 2005, Naval Expeditionary Combatant Command - Kuwait Detachment in 2007, Provincial Reconstruction Team, Helmand Province, Afghanistan in 2010, and NATO Role 3 Multinational Medical Unit, Kandahar, Afghanistan in 2014.
He served in various technical and leadership capacities such as Advanced Medical Laboratory Technician, Fleet Marine Force General Duty Corpsman, Medical Logistics Manager, Platoon Sergeant, Explosive Ordnance Disposal Corpsman, Medical Laboratory Technician Program Instructor, Command Career Counselor, Leading Chief Petty Officer, Senior Enlisted Leader and transitioned as Command Senior Enlisted Leader in May 2023.
His decorations include two Meritorious Service Medals, five Navy and Marine Corps Commendation Medals, four Navy and Marine Corps Achievement Medals, and various campaign and service medals. He holds qualifications as an Enlisted Fleet Marine Force Warfare Specialist, Enlisted Surface Warfare Specialist, and Master Training Specialist. He is a graduate of the Navy’s Senior Enlisted Academy (Class 192), Command Master Chief/Chief of the Boat Course (Class 23095), and Major Command Master Chief Course.