Central Intelligence Agency

Central Security Service

Federal Bureau of Investigation

National Security Agency

US Marshal

Drug Enforcement Administration

Bureau of Alcohol, Tobacco, Firearms and Explosives

United States Customs and Border Protection (CBP)

United States Customs and Border Protection (CBP) is one of the Department of Homeland Security’s largest and most complex components, with a priority mission of keeping terrorists and their weapons out of the U.S. It also has a responsibility for securing and facilitating trade and travel while enforcing hundreds of U.S. regulations, including immigration and drug laws.

United States Coast Guard (USCG)

The United States Coast Guard is one of the five armed forces of the United States and the only military organization within the Department of Homeland Security. The Coast Guard protects the maritime economy and the environment, defends our maritime borders, and saves those in peril.

Directorate for Management

The Directorate for Management is responsible for budget, appropriations, expenditure of funds, accounting and finance; procurement; human resources and personnel; information technology systems; facilities, property, equipment, and other material resources; and identification and tracking of performance measurements relating to the responsibilities of the Department.

Domestic Nuclear Detection Office

The mission of the Domestic Nuclear Detection Office is to prevent nuclear terrorism by continuously improving capabilities to deter, detect, respond to, and attribute attacks, in coordination with domestic and international partners.

Federal Emergency Management Agency (FEMA)

The Federal Emergency Management Agency (FEMA) supports our citizens and first responders to ensure that as a nation we work together to build, sustain, and improve our capability to prepare for, protect against, respond to, recover from, and mitigate all hazards.

Federal Law Enforcement Training Center (FLETC)

The Federal Law Enforcement Training Center provides career-long training to law enforcement professionals to help them fulfill their responsibilities safely and proficiently.

United States Immigration and Customs Enforcement (ICE)

United States Immigration and Customs Enforcement (ICE) promotes homeland security and public safety through the criminal and civil enforcement of federal laws governing border control, customs, trade, and immigration.

National Protection and Programs Directorate

The goal of the National Protection and Programs Directorate is to advance the Department's risk-reduction mission. Reducing risk requires an integrated approach that encompasses both physical and virtual threats and their associated human elements.

Office of Health Affairs

OHA provides medical, public health, and scientific expertise in support of the Department of Homeland Security mission to prepare for, respond to, and recover from all threats.

Office of Intelligence and Analysis

The Office of Intelligence and Analysis equips the Homeland Security Enterprise with the timely intelligence and information it needs to keep the homeland safe, secure, and resilient.

Office of Operations Coordination

The Office of Operations Coordination provides information daily to the Secretary of Homeland Security, senior leaders, and the homeland security enterprise to enable decision-making; oversees the National Operations Center; and leads the Department’s Continuity of Operations and Government Programs to enable continuation of primary mission essential functions in the event of a degraded or crisis operating environment.

Office of Policy

The DHS Office of Policy serves as the Department’s principal source of thought leadership, policy development, and decision analysis for DHS senior leadership, Secretarial initiatives, and for other critical matters that may arise in a dynamic threat environment.

Science and Technology Directorate

The Science and Technology Directorate is the primary research and development arm of the Department. It provides federal, state and local officials with the technology and capabilities to protect the homeland.

Transportation Security Administration (TSA)

The Transportation Security Administration (TSA) protects the nation's transportation systems to ensure freedom of movement for people and commerce.

United States Citizenship and Immigration Services (USCIS)

United States Citizenship and Immigration Services (USCIS) secures America’s promise as a nation of immigrants by providing accurate and useful information to our customers, granting immigration and citizenship benefits, promoting an awareness and understanding of citizenship, and ensuring the integrity of our immigration system.

United States Secret Service (USSS)

The United States Secret Service (USSS) safeguards the nation's financial infrastructure and payment systems to preserve the integrity of the economy, and protects national leaders, visiting heads of state and government, designated sites, and National Special Security Events.