A Marine Security Guard (MSG), also known as a Marine Embassy Guard, is a member of the Marine Corps Embassy Security Group
(formerly Marine Security Guard Battalion), a
brigade
A brigade is a major tactical military formation that typically comprises three to six battalions plus supporting elements. It is roughly equivalent to an enlarged or reinforced regiment. Two or more brigades may constitute a division. ...
-sized organization of the
United States Marine Corps
The United States Marine Corps (USMC), also referred to as the United States Marines, is the maritime land force service branch of the United States Armed Forces responsible for conducting expeditionary and amphibious operations through ...
(USMC) whose detachments provide security at
American embassies, American
consulates and other official United States Government offices such as the United States Mission to
NATO
The North Atlantic Treaty Organization (NATO, ; french: Organisation du traité de l'Atlantique nord, ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 member states – 28 European and two No ...
in
Brussels, Belgium
Brussels (french: Bruxelles or ; nl, Brussel ), officially the Brussels-Capital Region (All text and all but one graphic show the English name as Brussels-Capital Region.) (french: link=no, Région de Bruxelles-Capitale; nl, link=no, Bruss ...
. The Marine Security Guard was
designated MOS 8151, though this has changed to MOS 8156.
The USMC has a long history of cooperation with the U.S. State Department, going back to the early days of the country. From the
raising of the American flag at
Derna,
Tripoli
Tripoli or Tripolis may refer to:
Cities and other geographic units Greece
*Tripoli, Greece, the capital of Arcadia, Greece
*Tripolis (region of Arcadia), a district in ancient Arcadia, Greece
* Tripolis (Larisaia), an ancient Greek city in t ...
, and the secret mission of
Archibald H. Gillespie
Major Archibald H. Gillespie (October 10, 1812 – August 16, 1873) was an officer in the United States Marine Corps during the Mexican–American War.
Biography
Born in New York City, Gillespie was commissioned in the Marine Corps in 1832. He co ...
in California, to the
Boxer Rebellion
The Boxer Rebellion, also known as the Boxer Uprising, the Boxer Insurrection, or the Yihetuan Movement, was an anti-foreign, anti-colonial, and anti-Christian uprising in China between 1899 and 1901, towards the end of the Qing dynasty, b ...
in
Beijing
}
Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 ...
, Marines have served many times on special missions as
courier
A courier is a person or organisation that delivers a message, package or letter from one place or person to another place or person. Typically, a courier provides their courier service on a commercial contract basis; however, some couriers are ...
s, as guards for embassies and delegations, and to protect American citizens in unsettled areas.
The formal and permanent use of Marines as security guards began with the
Foreign Service Act
The Rogers Act of 1924, often referred to as the Foreign Service Act of 1924, is the legislation that merged the United States diplomatic and consular services into the United States Foreign Service. It defined a personnel system under which the ...
of 1946, which authorized the
Secretary of Navy to, upon the request of the
Secretary of State, assign Marines to serve as custodians under the supervision of the senior diplomatic officer at a diplomatic post. The first joint
Memorandum of Agreement was signed on 15 December 1948 regarding the provisions of assigning Marines overseas. Trained at the
Foreign Service Institute, the first Marines arrived at
Tangier and
Bangkok
Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies in the Chao Phraya River delta in central Thailand and has an estimated populatio ...
in early 1949. The Marine Corps assumed the primary training responsibility in November 1954. The authority granted in the Foreign Service Act of 1946 has since been replaced by and the most recent Memorandum of Agreement was signed in October 2020. Although embassy duty is a crucial aspect of the Marines’ mission with a long tradition, the Corps is only budgeted to train and maintain a limited cadre of guards to cover over 100 embassies worldwide. In response to the
2012 Benghazi attack, Congress ordered a near doubling of Marine Security Guards in the midst of a post-war drawdown in overall USMC numbers. The USMC has responded by redeploying one company from
1st Battalion 1st Marines while additional guards are trained.
Responsibilities

The primary mission of the MSG is to provide security, particularly the protection of
classified information
Classified information is material that a government body deems to be sensitive information that must be protected. Access is restricted by law or regulation to particular groups of people with the necessary security clearance and need to k ...
and equipment vital to the
national security of the United States at American diplomatic posts. This is accomplished under the guidance and operational control of a civilian federal agent of the
Diplomatic Security Service, known as the
Regional Security Officer
Regional Security Officer (RSO) is the title given to a special agent of the U.S. Diplomatic Security Service (DSS) who is in charge of a Regional Security Office. The RSO is the principal security attaché and advisor to the U.S. Ambassador at ...
(RSO) who is the senior U.S. law enforcement representative and security attaché at U.S. diplomatic posts around the world. In addition, MSGs provide security for visiting American dignitaries and frequently assist the RSO in supervising host country or locally employed security forces that provide additional security for the exterior of embassies. The MSGs fall under operational control of the RSO and are administratively controlled by the Marine Corps Embassy Security Group. The secondary mission of Marine Security Guards is to provide protection for U.S. citizens and U.S. Government property located within designated U.S. Diplomatic and Consular premises during exigent circumstances, which require immediate aid or action.
MSGs focus on the interior security of a diplomatic post's buildings. In only the most extreme emergency situations are they authorized to provide special protection to the senior diplomatic officer off the diplomatic compound. MSGs carry a certain level of
diplomatic immunity in the performance of their official duties.
Organization
The Marine Security Guards number approximately a thousand Marines at 174 posts (also known as "detachments"), organized into nine regional MSG commands and located in over 135 countries in 18
time zones, as well as its headquarters at
Marine Corps Base Quantico.
Headquarters Company, along with MSG School, is composed of approximately 100 Marines providing administrative, logistical, legal, training and education support.
The remaining nine regions are commanded by a
lieutenant colonel
Lieutenant colonel ( , ) is a rank of commissioned officers in the armies, most marine forces and some air forces of the world, above a major and below a colonel. Several police forces in the United States use the rank of lieutenant colonel ...
, and typically entail a number of detachments in several countries. The companies are as follows:
Each Detachment is commanded by a
Staff Non-Commissioned Officer, being one of the few instances where an enlisted Marine may hold the title of "commander". Generally between the ranks of
Staff Sergeant
Staff sergeant is a rank of non-commissioned officer used in the armed forces of many countries. It is also a police rank in some police services.
History of title
In origin, certain senior sergeants were assigned to administrative, supervi ...
and
Master Gunnery Sergeant, Marine Detachment Commanders serve two tours, which generally last 18 months each. Unlike their subordinates, however, Detachment Commanders may be married. The minimum detachment size is seven MSGs (Marine Security Guards) and a one detachment commander. This allows for posts to be manned at all times while allowing each of the Marines to conduct other routine training, internal management of the detachment and have some time off.
A Marine Security Guard usually serves three 12-month tours of duty. Marine Security Guard "watch standers" are enlisted Marines from the rank of
Private First Class
Private first class (french: Soldat de 1 classe; es, Soldado de primera) is a military rank held by junior enlisted personnel in a number of armed forces.
French speaking countries
In France and other French speaking countries, the rank (; ...
to Staff Sergeant.
Duty

After every three years as a Marine Security Guard with the Marine Corps Embassy Security Group, any Marine is entitled to the
Marine Corps Security Guard Ribbon
The Marine Corps Security Guard Ribbon is a United States Marine Corps military award that was established by order of Secretary of the Navy John Howard Dalton on 15 July 1997. The award recognizes those Marine Corps personnel who have served as ...
. According to the Marine Corps Uniform Regulations Order (Section 4-4a Line 24) Marine Security Guards are authorized to wear subsequent
service stars.
Marines of any
Military Occupational Specialty may volunteer for a three-year
tour of duty;
however, non-Staff NCOs with
dependants are not eligible, as well as Marines with potentially offensive
tattoos, legal or security restrictions, non–
United States citizenship,
dual citizenship, significant financial indiscretions, and any other restriction that would prevent a
top secret clearance.
Before being assigned to a Foreign Service post, a Marine accepted into the MSG program must successfully complete a training program located at the Marine Corps Embassy Security Group (MCESG), which is located at
Marine Corps Base Quantico, Virginia. Marine Security Guard duty is one of a few special duty assignments available to qualified Marines. Marine Security Guard duty can be dangerous; there have been instances where Marines have been killed during this duty (most recently,
Cpl Steve Crowley in 1979,
Cpl Robert V. McMaugh in 1983,
Robert V. McMaugh
/ref> and Sgt Jesse Aliganga in 1998). Embassy duty is a crucial aspect of the Marine Corps' mission with a long tradition; the Corps is currently tasked to train and maintain a cadre of guards to cover 181 embassies and consulates worldwide with the ability to augment assigned forces as necessary.
See also
* Marine Corps Security Guard Ribbon
The Marine Corps Security Guard Ribbon is a United States Marine Corps military award that was established by order of Secretary of the Navy John Howard Dalton on 15 July 1997. The award recognizes those Marine Corps personnel who have served as ...
* Marine Corps Security Force Regiment
The Marine Corps Security Force Regiment is a dedicated security and anti-terrorism unit of the United States Marine Corps. It provides security forces to guard high-value naval installations, most notably those containing nuclear vessels and ...
* White House sentries
* Embassy of the United States, Baghdad
The Embassy of the United States of America in Baghdad is the diplomatic mission of the United States of America in the Republic of Iraq. Ambassador Alina Romanowski is currently the Chief of Mission.
At , it is the largest embassy in the wo ...
References
*Frampton, James Scott, ''The Influence of Attitudes and Morale on the Performance of Active-Duty United States Marine Corps Female Security Guards'' (2011)
External links
Marine Corps Embassy Security Group
Official Website
on GlobalSecurity.org
on specialoperations.com
Marine Embassy Guard Association
*
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