51st Security Forces Squadron

The 51st SFS Defenders train and integrate with host nation counterparts to be Always Ready to Defend the Base and guard the freedom of the 51 million people in the Republic of Korea. These quiet professionals are “Ready to Fight Tonight” in support of the 51st FW’s mandate of “Leading the Charge.” 

The 51st Security Forces Squadron is the largest Security Forces unit in the Pacific Air Forces, defending the most forward-deployed fighter wing in the Air Force, and guarding more than $18 billion dollars in Protection Level 1 through 4 resources. On Oct. 25, 1950, the 51st Air Police Squadron, which would become the 51st Security Police Squadron and finally the 51st Security Forces Squadron, was deployed to Kimpo Air Base, Republic of Korea, and baptized in combat.

In the Asian lunar calendar, 12 animal and five element combinations represent each year with 1950 being the “Year of the Metal Tiger” -- hence the 51st Security Forces Squadron’s nickname.  Revered by the Korean people as a guardian, the tiger is known for its courage, aggressiveness and for never faltering.

The Metal Tiger seen on the unit patch represents our combat heritage and warrior spirit since the first deployment in 1950. The two crossed Korean swords represent our Armistice and Wartime missions and the close relationship between U.S. and Korean forces.

Maintain a secure environment from which to generate combat power. 

The 51st SFS Metal Tigers will provide superior Integrated Defense to Team Osan through persistent, innovative, and intelligence-led tactics, techniques and procedures.


Admin (S1)

Manages and executes commander’s administrative programs, security clearances, performance reports, and decorations. Responsible for maintaining records and personnel files on all 51st SFS Airmen.

Wartime Operations, Intelligence, and Investigations (S2)
Uniquely to the 51st SFS, this section includes wartime operations and planning through the Combined Defense Operations Center, ready to immediately “fight the base” during a contingency. Similar to other SFS units, S2 provides investigation services with a focus on monitoring human trafficking and prostitution in the immediate area off base, administrating the Armed Forces Disciplinary Control Board for the 51st FW and 51st Mission Support Group commanders, and integrating with the U.S. Army through the Joint Intel Fusion Cells for intelligence sharing. They also maintain a direct liaison with ROK army forces supporting the defense of Osan AB.

Operations (S3)
Responsible for daily entry control, base security, and police services during armistice as well as base and area security during a contingency. S3 manages the largest operational K-9 kennel in the U.S. Air Force, the fusion of combat-readiness skills into training curriculum, and provides a liaison confinement NCO to the peninsula USFK regional confinement facility at U.S. Army Garrison Humphreys.  

Logistics (S4)
Ensures the squadron is armed, equipped and ready for armistice or wartime missions. Manages the 51st SFS vehicle fleet, qualifies personnel on a variety of weapon systems, oversees SF-related building construction and projects and manages an annual multi-million dollar budget.

Plans and Programs (S5)
Responsible for all of 51st SFS’s plans and programs, physical security, and anti-terrorism. They help over 64,000 customers a year with over 5 million annual Defense Biometric Identification Data System (DBIDS) vehicle and pedestrian scans, control rations for 7,300 accounts, issue 2,400 restricted area badges, administer the base’s Anti-Terrorism program, customs services for over 1,000 aircraft, and maintains electronic security at PACAF’s only PL-1 resource.

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