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3d Battalion 12th Marines

3d Battalion 12th Marines Leaders

Commanding Officer

Lieutenant Colonel Frank J. Mastromauro

Lieutenant Colonel Frank J. Mastromauro, who calls Barnstable, MA home, graduated from Boston University in 2006 and received his commission through the Officer Candidate Course in March 2008. Lieutenant Colonel Mastromauro reported to The Basic School in March and the Field Artillery Basic Course...

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Official Photo

Sergeant Major

Sergeant Major Joshua J. Henderson

First Sergeant Henderson was born on 23 August 1985 in Conroe, Texas. He enlisted in the Marine Corps in April 2004 and attended recruit training at Marine Corps Recruit Depot, San Diego, California.  Upon completion of recruit training, he received training at Marine Combat Training School (MCT),...

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Official Photo

3d Battalion
12th Marine Littoral Regiment
Unit 36110
FPO, AP 96385-6110

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 S1 (Admin)



S-1 Adjutant

DSN: 315-623-7764

S-1 Chief
DSN: 315-623-7765



 S2 (Intel)



S-2 Intel Officer

DSN: 315-623-4058

S-2 Chief
DSN: 315-623-4777



 S3 (Ops)



Operations Officer

DSN: 315-623-7763

DSN: 315-623-1157

S3 Chief
DSN: 315-623-4213

S3 Training
DSN: 315-623-4796



 S4 (Log)



S4 Officer

DSN: 315-623-4614

DSN: 315-623-7723

S4 Chief/Embark
DSN: 315-623-1690

Motor Transport Officer
DSN: 315-623-7188

Supply Officer
DSN: 315-623-4456

Medical Officer
DSN: 315-623-4188



 S6 (Comm)



S6 Officer

DSN: 315-623-3456/1733

S6 Chief
DSN: 315-623-4605

Radio Chief
DSN: 315-623-7183

Wire Chief
DSN: 315-623-4294

Data Chief
DSN: 315-623-4294

EM Chief
DSN: 315-623-4284





Supply Officer

DSN: 315-623-4456

Supply Chief
DSN: 315-623-4438






DSN: 315-623-7766

Chaplain Assistant
DSN: 315-623-7766





Medical Officer

DSN: 315-623-4452

Dental Clinic
DSN: 315-623-4658


 Career Retention



Career Retention Specialist

DSN: 315-623-7750


 Deployment Readiness

Deployment Readiness Coordinator
DSN: 315-623-7742
COM: 011-81-611-723-7742