An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

Marines


23D Marine Regiment
Unit Logo - 23rd Marine Regiment
Fourth Marine Division
Marine Corps Forces Reserve

900 Commodore Drive
San Bruno, CA. 94066

Duty Phone
650-537-2404
 

COMMANDING OFFICER 

Colonel 
Robert M. Barnhart Jr.

 [ Biography ]     [ Photo ]

SENIOR RESERVE ADVISOR 

Colonel 
Philip H. Steuber


 [ Biography ]     [ Photo ]

EXECUTIVE OFFICER 

 


 [ Biography ]     [ Photo ]

COMMAND SENIOR ENLISTED LEADER 

Sergeant Major 
Robert W. Poor

 [ Biography ]     [ Photo ]

INSPECTOR - INSTRUCTOR

Lieutenant Colonel 
Benjamin D. Early

 [ Biography ]     [ Photo ]

INSPECTOR - INSTRUCTOR
COMMAND SENIOR ENLISTED LEADER 

Sergeant Major 
Brian E. Anderson

 [ Biography ]     [ Photo ]

MISSING PHOTO
​23D MARINE REGIMENT 

Gunnery Sergeant
Kristina Perieff
Phone:  (650) 244-9806 x 1010
kristina.perieff@usmc.mil

   
 
Career Planner
1st BATTALION

Sergeant
Mark Duncan II
Phone:  (719) 317-2345
mark.duncan@usmc.mil

  Career Planner
2D BATTALION

Staff Sergeant
Cesar Rodarte
Phone:  (626) 398-0295 x 1507
cesar.rodarte@usmc.mil

Career Planner
​3D BATTALION

Staff Sergeant
David Ray
Phone:  
david.ray@usmc.mil

  MISSING PHOTO
2D BATTALION
24th MARINE REGIMENT

Sergeant
Mariah Soto
Phone:  719-317-7751
mariah.soto@usmc.mil

Career Planner
TRUCK COMPANY

Sergeant
Bradley Hunt
Phone:  (719) 317-4333
bradley.hunt@usmc.mil

 

 

   
 
         

 

 


 

 


FIND OPEN BILLETS

 

 



news  /  PHOTOS  /  VIDEOS
U.S. Navy Hospital Corpsman Petty Officer 1st Class Jorge Velasquez, 23D Marine Regiment, 4th Marine Division, Marine Forces Reserve, preforms a “blood sweep” on patient Sgt. Marissa Escobedo as Chief Calderin-Serrano monitors her breathing for the Valkyrie whole blood transfusion program in San Bruno, CA on Jan. 10, 2024. The Valkyrie Program is a course designed to teach attendees how and when to apply a whole blood transfusion to casualties in a combat environment. (Courtesy Photo)
U.S. Navy Hospital Corpsman Petty Officer 2nd Class Jacob Evans, 23D Marine Regiment, 4th Marine Division, Marine Forces Reserve, adjusts a pelvic binder on his patient Sgt. Agustin Michel-Valdez for the Valkyrie whole blood transfusion program in San Bruno, CA on Jan. 10, 2024. The Valkyrie Program is a course designed to teach attendees how and when to apply a whole blood transfusion to casualties in a combat environment. (Courtesy Photo)
U.S. Navy Hospital Corpsman Chief Petty Officer Julio Calderin-Serrano, 23D Marine Regiment, 4th Marine Division, Marine Forces Reserve, gains IV access to his patient, Sgt. Timothy Pham, before beginning blood transfusion for the Valkyrie program in San Bruno, CA on Jan. 10, 2024. The Valkyrie Program is a course designed to teach attendees how and when to apply a whole blood transfusion to casualties in a combat environment. (Courtesy Photo)
U.S. Navy Hospital Corpsman Petty Officer 2nd Class Jacob Evans, 23D Marine Regiment, 4th Marine Division, Marine Forces Reserve, adjusts a pelvic binder on his patient Sgt. Agustin Michel-Valdez for the Valkyrie whole blood transfusion program in San Bruno, CA on Jan. 10, 2024. The Valkyrie Program is a course designed to teach attendees how and when to apply a whole blood transfusion to casualties in a combat environment. (Courtesy Photo)
U.S. Marines with 2nd Battalion, 23d Marine Regiment, 4th Marine Division, Marine Forces Reserve conduct Mountain Training Exercise 4-23 at Marine Corps Mountain Warfare Training Center, Bridgeport, California, June 25, 2023. Marines participate in MTX to focus on mission essential tasks such as assault climbing, animal packing and small unit movements, to strengthen expeditionary high-altitude warfare tactics in a mountainous environment. MTX trains elements of the Marine Air-Ground Task Force across the warfighting functions in preparation for operations in mountainous environments, enhancing 2/23’s readiness and lethality. (U.S Marine Corps video by Cpl. Jonathan L. Gonzalez) The Music within the following video production is copyright material used under license with HookSounds contract dated 1 Dec. 2023.
U.S. Marine Corps Cpl. Hunter Greenlaw, a rifleman with Bravo Company, 1st Battalion, 23rd Marine Regiment, attempts to breach through barbed wire during a demolition scenario for a Mission Rehearsal Exercise at Joint Reserve Training Center, Fort Polk, Louisiana, April 21, 2023. The MRX is a collective training event with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23, the largest Marine Corps Reserve exercise of the year. (U.S. Marine Corps photo by Cpl. Jennifer Delacruz)
U.S. Marine Corps Lance Cpl. Mitchell Turner, a rifleman with Bravo Company, 1st Battalion, 23rd Marine Regiment, applies a tourniquet during Tactical Combat Casualty Care training for a Mission Rehearsal Exercise at Fort Polk, Louisiana, April 21, 2023. The MRX is a collective training event with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23, the largest Marine Corps Reserve exercise of the year. (U.S. Marine Corps photo by Cpl. Jennifer Delacruz)
U.S. Marine Corps Lance Cpl. Mitchell Turner, a rifleman with Bravo Company, 1st Battalion, 23rd Marine Regiment, low crawls during Tactical Combat Casualty Care training for a Mission Rehearsal Exercise at Fort Polk, Vernon Parish, Louisiana, April 21, 2023. The MRX is a collective training event with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23, the largest Marine Corps Reserve exercise of the year. (U.S. Marine Corps photo by Cpl. Jennifer Delacruz)
U.S. Marines with Bravo Company, 1st Battalion, 23rd Marine Regiment, maneuver through barbed wire during a demolition scenario for a Mission Rehearsal Exercise at Joint Reserve Training Center, Fort Polk, Louisiana, April 21, 2023. The MRX is a collective training event with Marine Air Ground Task Force integration to evaluate the Marines’ individual and cooperative capabilities in order to ensure their level of readiness for the upcoming Integrated Training Exercise 4-23, the largest Marine Corps Reserve exercise of the year. (U.S. Marine Corps photo by Cpl. Jennifer Delacruz)
U.S. Marines with 23rd Marine Regiment, 4th Marine Division, in support of Special Purpose Marine Air-Ground Task Force UNITAS LXIV, establish satellite communication for the command control center in preparation for exercise UNITAS LXIV, aboard Escuela de Formación de Infantería Marina Coveñas in Coveñas, Colombia, July 11, 2023. UNITAS, taking place in Colombia this year, is the world’s longest-running annual multinational maritime exercise that focuses on enhancing interoperability among multiple nations and joint forces during littoral and amphibious operations in order to build on existing regional partnerships and create new enduring relationships that promote peace, stability, and prosperity in the U.S. Southern Command’s area of responsibility. (U.S. Marine Corps photo by Sgt. Emily Kirk)
U.S. Marine Corps Capt. Justin Knott, a infantry officer with 3rd Battalion, 23rd Marine Regiment, 4th Marine Division, native of St Louis, Alabama, fast ropes down a rappel tower during UNITAS LXIV on Base de entrenamiento de infanteria de marina (Colombian Marine Corps training base) Covenas, Colombia, July 17,2023. UNITAS, taking place in Colombia this year, is the world’s longest-running annual multinational maritime exercise that focuses on enhancing interoperability among multiple nations and joint forces during littoral and amphibious operations in order to build on existing regional partnerships and create new enduring relationships that promote peace, stability, and prosperity in the U.S. Southern Command’s area of responsibility. (U.S. Marine Corps photo by Lance Cpl. Christian Salazar)

 



RESOURCES AND ASSISTANCE