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Health Services

Headquarters Marine Corps


Senior Chief Coslett was born on October 25, 1976 and raised in San Diego, CA.  He enlisted in the Navy in July 1995. Following Hospital Corpsman “A” School and Field Medical Service School, Hospitalman Coslett reported to Marine Corps Recruit Depot, San Diego, CA in February 1996, where he was assigned as the Golf Co. Corpsman.

In November 1998, he transferred to the USS MCCLUSKY (FFG 41) as a Junior Medical Department Representative.  In December 1998, he was promoted to Hospital Corpsman 3rd Class.  He earned his Enlisted Surface Warfare Specialist Insignia, and was a member of the Visit, Board, Search and Seizure Team during multiple deployments to the Persian Gulf for Operation Desert Fox.  In February 2001, he was meritoriously advanced to Hospital Corpsman 2nd Class.

In November 2001, HM2 Coslett completed the Search and Rescue In-flight Medical Technician program, earning his Naval Aircrew designation and reported to the Naval Air Station Corpus Christi Station SAR unit and the Naval Hospital.  HM2 Coslett simultaneously filled positions as the LPO of the Patient Administration Department and as a 2nd Crewman for the SAR Unit.  In January 2003, HM2 Coslett deployed in support of Operation Iraqi Freedom for Marine Air Group 39 and helped to form the I Marine Expeditionary Force Casualty Evacuation (CASEVAC) Program.  HM2 Coslett earned his Combat Aircrew Designation and Enlisted Fleet Marine Force Warfare Specialist Insignia.

In May 2006, HM2 Coslett completed Surface Force Independent Duty Corpsman School and graduated with honors.  HM1 Coslett reported to the USS UNDERWOOD (FFG 36) in Mayport, FL as Senior Medical Department Representative completing multiple deployments in support of the Global War of Terrorism and Counter Narcotics.  In August 2008, HM1 Coslett was selected to Hospital Corpsman Chief Petty Officer.

After a successful tour on USS UNDERWOOD, HMC Coslett was selected to teach at Surface Force Independent Duty Corpsman School, San Diego in July 2009.  During his tour, HMC Coslett deployed for an IA assignment with Naval Mobile Construction Battalion 18 in support of Operation Enduring Freedom from April 2010-2011.  While with NMCB-18, he earned his Enlisted Seabee Combat Warfare Specialist.  Upon returning to SFIDC School, HMC Coslett earned his Master Training Specialist Qualification and took on the responsibilities as IDC Program manager for Navy Medicine Operational Training Center where he managed Surface, Sub-surface, and Special Operations Independent Duty Corpsman assigned to four detachments across the United States.

Chief Coslett held the position of Naval Special Warfare Unit TEN Department Head and Senior Medical Department Representative in Stuttgart, Germany from July 2012 to February 2014.  There he managed all NSW Task Unit medical personnel deployed across the continent of Africa in support of SOF missions through Special Operations Command Africa.

In February 2014, Chief Coslett was selected to assume his current position as the IDC Program Manager and IG Inspector for Headquarters US Marine Corps, where he manages all Independent Duty Corpsman assigned to Fleet Marine Force billets.  In June 2014, he was selected for Senior Chief Petty Officer.

Senior Chief Coslett received his Associates of Science in Clinical Medicine from George Washington University in 2012 and is currently pursuing his Bachelors of Science in Clinical Health Sciences.  

Senior Chief Cosletts’ decorations include Strike/Flight Air Medal (two Awards); Navy and Marine Corps Commendation Medal (three awards); Navy and Marine Corps Achievement Medal (six awards); Army Achievement Medal as well as other personal, unit and campaign awards.

Senior Chief Coslett is married to LT Rayma N. Coslett, PA-C.  LT Coslett is assigned Branch Health Clinic Quantico. They have one daughter named Charleston.

IDC Program Manager


Jeffrey S. Coslett

U.S. Navy