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MSC Ship Support Unit Guam

MSC Ship Support Unit (SSU) Guam provides operations, logistics, maintenance, and administrative support for all MSC operated, controlled, and interest vessels in support of the Type Commander and/or as directed by the Area Commander in support of the Fleet Commander.


Commanding Officer

Commander Omari D. Buckley
Commanding Officer
Military Sealift Command, Ship Support Unit, Guam

Cmdr. Omari D. Buckley, a native of Harrisville, Miss., enlisted in the Navy in July of 1997 as an Operations Specialist and served in USS Arleigh Burke (DDG 51). He was selected and attended the Broadened Opportunity for Officer Selection and Training (BOOST) program and graduated from Old Dominion University in 2004 with a Bachelor of Science in Mechanical Engineering Technology. He holds a Master’s Degree in Mechanical Engineering from the Naval Post Graduate School and Defense Technology and Systems from the National University of Singapore.

Cmdr. Buckley served his first Division tour in USS Carter Hall (LSD 50) as 2nd Division Officer, deploying to the Fifth and Sixth Fleet AORs.  After completing the AEGIS pipeline, he served as Fire Control and Combat Systems Officer in USS Chancellorsville (CG 62), deploying to the Fifth and Seventh Fleet AORs. Following Department Head Training, he reported as Weapons Officer in USS Leyte Gulf (CG 55). He served as the Combat Systems Officer in USS Vicksburg (CG 69) and deployed as Flagship to Commander, Standing NATO Maritime Group Two.  He completed his most recent afloat tour as the Executive Officer of USS Hershell “Woody” Williams (ESB 4) Gold Crew.

Cmdr. Buckley completed his shore duty assignments in the Director for Joint Force Development (J7) and in Surface and Mine Warfare Division Command, Amphibious Warfare Division in Little Creek, VA as a Warfare Tactics Instructor (WTI).

His personal decorations include the Defense Meritorious Service Medal, Navy Meritorious Service Medal, Navy Commendation Medal (two awards), Navy Achievement Medal (three awards), and various unit, campaign and service awards.

Deputy Director

Mr. Gregory S. Davis
 Deputy Director and Operations Officer
Military Sealift Command, Ship Support Unit, Guam

Mr. Davis was born in Bloomington, Ind., attended schools in Indiana, California, and Tennessee, and was commissioned an ensign in the U.S. Navy through the NROTC program in May 1978 upon graduation from that great seafaring institution, the University of Kansas.  He served multiple tours at sea based out of Yokosuka, Japan and ashore in Okinawa, Panama, and Guam prior to leaving the Navy in December 1988.

After working in the commercial maritime sector and becoming a licensed Master (near coastal limited tonnage – with a submersible endorsement!), Mr. Davis entered federal civil service as the U.S. Naval Activities Guam (now US Naval Base Guam) Port Control Officer in January 1994.  In April 1995 he moved to MSC WESTPAC (now MSC SSU Guam) as the operations officer and has, since then, seen MSC in Guam through numerous changes as both deputy director and operations officer.

Mr. Davis has made multiple deployments to both Thailand and Australia in support of MSC operations and is a recipient of the Meritorious Civilian Service Medal.


Senior Enlisted Leader

Senior Chief Hospital Corpsman Alex J. Valencia
Senior Enlisted Leader
Military Sealift Command, Ship Support Unit, Guam

HMCS Alex Valencia is from Tucson, Ariz., and enlisted in the Navy in August 2004. He finished Hospital Corpsman "A" School on February 2005 with follow-on orders to Pharmacy Technician "C" School, Portsmouth, Va. via Field Medical Service School, Camp Lejeune, N.C.
He graduated Pharmacy Technician "C" School in December 2005, and then reported to U.S. Naval Hospital Yokosuka, Japan. He deployed with Expeditionary Medical Facility (Det Echo) to Camp Arifjan, Kuwait in support of Operation Iraqi Freedom in 2007.
Upon his return in 2008, reported to Naval Medical Center San Diego, where he deployed with Marine Wing Support Squadron 373 to Camp Leatherneck, Afghanistan 2010-11. He then reported to Independent Duty Corpsman "C" School in San Diego, CA, from February 2012- March 2013.
He reported to 2nd Battalion, 3rd Marines (REIN) in Kaneohe, Hawaii, in March 2013 to May 2016 and deployed twice to the Western Pacific. In May 2016, he reported to Naval School of Explosive Ordinance Disposal Eglin AFB, Fla. as an instructor, where he qualified as a hyperbaric chamber inside tender.
He reported to the USS Lake Champlain (CG 57) in March 2019 through July 2022 for independent duty, and completed an austere work up cycle and deployment to the Western Pacific.
Senior Chief Valencia has qualified as a Master Training Specialist, Enlisted Surface Warfare Specialist, Enlisted Air Warfare Specialist, and Enlisted Fleet Marine Force Warfare Specialist in the Ground and Air Combat Element.
His personal awards include the Joint Commendation Medal, Navy Commendation Medal, Navy and Marine Corps Achievement Medal (5), Army Achievement Medal, and the Afghanistan Campaign medal.

Contact Us
For DSN, dial 315 in place of area code

Command Sponsorship

N1/ Civilians           Comm: (671) 339-5341
HR/Manpower         Email
CivMar Support

N1/Military             Comm: (671) 339-8224

Staff Phone Numbers:

N3                          Comm: (671) 339-2088

N4                          Comm: (671) 339-8041

N6                          Comm: (671) 339-5656

N7                          Comm: (671) 339-6046

N8                          Comm: (671) 339-3542

N10                        Comm: (671) 339-2082

OMBUDSMAN         Comm: (671) 698-1554

Mailing address:

PSC 455 Box 198
FPO AP 96540-2600

Via Fedex/UPS/DHL address: 
Bldg 3110, Naval Base Guam,
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